14 (number) 1492 14th Century 1490s 1436 1476 1400s

#REDIRECT Numbers (10s)
Cardinal	14 fourteen
Ordinal	14th fourteenth
Factorization
Divisors	1, 2, 7, 14
Roman numeral	XIV or XIIII
Binary	1110
Hexadecimal	E

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 numberA pyramidal number or square pyramidal number is a figurate number that represents a pyramid with a base and four sides. The n''th pyramidal number is : The first few pyramidal numbers are 1, 5, 14, 30, 55, 91, 140, 204, 285, 385, 506, 650, 819 Pyramidal.

This number is the lowest even n for which the equation φ(x) = n has no solution, making it the first even nontotientA nontotient is a positive integer n which is not in the range of Euler's totient function φ, that is, for which φ x n has no solution. In other words, n is a nontotient if there is no integer x that has exactly n coprimes below it. All odd number (see Euler's totient functionIn number theory, the totient φ n of a positive integer n is defined to be the number of positive integers less than or equal to n and coprime to n''. For example, φ(8) 4 since the four numbers 1, 3, 5 and 7 are coprime to 8. The function φ so). It is a Catalan numberThe Catalan numbers named after the Belgian mathematician Eugene Charles Catalan (1814—1894), form a sequence of natural numbers that occur in various counting problems in combinatorics. The n''th Catalan number is defined by : (see binomial coefficient)..

Take a setThis article is about sets in mathematics. For other meanings, see Set (disambiguation). Sets are one of the most important and fundamental concepts in modern mathematics. Basic set theory, having only been invented at the end of the 19th century, is now of real numberIn mathematics, the real numbers are intuitively defined as numbers that are in one-to-one correspondence with the points on an infinite line—the number line. The term "real number" is a retronym coined in response to " imaginary number". Real numbers mays 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.

2 In other fields

Fourteen is:

The atomic number of silicon.
The upper limit of pH scale.
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 and J + S + B + A + C + H = 41.
The number of points outlined by president Woodrow Wilson for reconstructing a new Europe following World War I, see Fourteen Points.
Among neo-Nazis to signify the "14 words", "We must secure the existence of our people and a future for white children", attributed to David Lane.
An unlucky number in China because it is homonymous with ???? which means "must die".
The number of a Mexican street gang, the Norteños. It designates N, the fourteenth letter of the alphabet, which stands for " North".
The number of legs on a pillbug, as well as on Hallucigenia.
Historical years: 14 A.D., 14 B.C., or 1914
A common designation for the thirteenth floor in many buildings for superstitious reasons
The G-14 is a union of fourtien football clubs.
In rugby union the right wing wears the 14 shirt.
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 .

1 4 Catalan_numbers

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Topics: 14 (number), 1492, 14th Century, 1490s, 1436, 1476, 1400s...