14 (number)

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14 10 4

14 (fourteen) is the natural number following 13 and preceding 15.

Cardinal 14
fourteen
Ordinal 14th
fourteenth
Factorization 2 \cdot 7
Divisors 1, 2, 7, 14
Roman numeral XIV
Roman numeral (Unicode) XIV, xiv
Binary 1110
Octal 16
Duodecimal 12
Hexadecimal E
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Contents

[edit] In mathematics

Fourteen is a composite number, its proper divisors being 1, 2, 7 and 14.

14 is the 3rd discrete biprime ( 2 . 7 )and the 3rd member of the (2.q) discrete biprime family. The number following 14;15 ,is itself a discrete biprime and this is the first such pair of discrete biprimes The next example is the pair commencing 21

The aliquot sum σ(n) of 14 is 10, also a discrete biprime and this is again the first example of a discrete biprime having an aliquot sum in the same form. 14 has an aliquot sequence of 6 members ( 14,10,8,7,1,0) 14 is the 3rd composite number in the 7-aliquot tree.


In base fifteen and higher bases (such as hexadecimal), fourteen is represented as E.

Fourteen is the sum of the first three squares, which makes it a square pyramidal number.

This number is the lowest even n for which the equation φ(x) = n has no solution, making it the first even nontotient (see Euler's totient function).

14 is a Catalan number, the only semiprime among all Catalan numbers.

Take a set of real numbers and apply the closure and complement operations to it in any possible sequence. At most 14 distinct sets can be generated in this way. This holds even if the reals are replaced by a more general topological space.

Fourteen is a Keith number in base 10: 1, 4, 5, 9, 14, 23, 37, 60, 97, 157...

Fourteen is an open meandric number.

Fourteen is a Companion Pell number.

There are fourteen possible Bravais lattices that fill three-dimensional space.

The cuboctahedron, the truncated cube, and the truncated octahedron each have fourteen faces. The rhombic dodecahedron, which tessellates 3-dimensional space and is the dual of the cuboctahedron, has fourteen vertices. The truncated octahedron, which also tessellates 3-dimensional space, is the only permutohedron.

[edit] In science

[edit] Chemistry

[edit] Astronomy

  • The Saros number of the lunar eclipse series which began on -2230 June 1 and ended on -932 July 19. The duration of Saros series 14 was 1298.1 years, and it contained 73 lunar eclipses.

[edit] In religion

[edit] As lucky or unlucky number

  • 14 represents good luck in South American countries
  • 14 is an unlucky number in China. Although 14 is usually said as "shi si," which sounds like "ten die", it can also be said as "yi si," literally "one four." There is also a common way to say "one," and it is "yao." Thus, 14 can also be said as "yao si," literally "one four," but it sounds like "want to die." See Numbers in Chinese culture

[edit] Age 14

  • In the UK a minor aged 14 can be tried in court for any sexual offence.
  • This is the youngest age in which a person could legally get access to the social networking website MySpace.

[edit] In sports

[edit] In other fields

Fourteen is:

  • The number of days in a fortnight.
  • In traditional British units of weight, the number of pounds in a stone.
  • A number 'encoded' in a lot of the music of Johann Sebastian Bach. Bach may have considered this number a sort of signature, since given A = 1, B = 2, C = 3, etc., then B + A + C + H = 14.
  • The number of points outlined by president Woodrow Wilson for reconstructing a new Europe following World War I, see Fourteen Points.
  • Among White Nationalists, 14 signifies the "Fourteen Words"—"We must secure the existence of our people and a future for white children"—attributed to David Lane.
  • The section that you go to when you die in the Grailquest books
  • The number of a Mexican street gang, the Norteños. It designates N, the fourteenth letter of the alphabet, which stands for "Northerner".
  • The number of legs on a pillbug, as well as on Hallucigenia.
  • A common designation for the thirteenth floor in many buildings for superstitious reasons
  • The number of fonts included in a standard installation of Adobe Acrobat or Acrobat Reader (called "Base 14 fonts"). This set is the same as Base 13 fonts with the addition of Zapf Dingbats.
  • The number of points in a proposed republican constitution of the United Kingdom
  • In tarot, card No. 14 is "Temperance".
  • The number of lines in a sonnet.

[edit] Historical years

14 A.D., 14 B.C., 1914, 2014, etc.

[edit] References