• 14 can be written using four 4's:

14 has 4 divisors (see below), whose sum is σ = 24. Its totient is φ = 6.

The previous prime is 13. The next prime is 17. The reversal of 14 is 41.

Added to its reverse (41) it gives a triangular number (55 = T_{10}).

14 is nontrivially palindromic in base 6 and base 13.

14 is an esthetic number in base 4, base 12 and base 14, because in such bases its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is the 4-th Catalan number.

14 is a repfigit number.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 1 and 4 contains 14 itself.

It is a magnanimous number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

14 is a nontrivial repdigit in base 6 and base 13.

It is a plaindrome in base 3, base 5, base 6, base 8, base 9, base 10, base 11, base 12 and base 13.

It is a nialpdrome in base 2, base 4, base 6, base 7, base 13 and base 14.

It is a zygodrome in base 6 and base 13.

It is a congruent number.

It is a panconsummate number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2 + ... + 5.

It is an arithmetic number, because the mean of its divisors is an integer number (6).

14 is a deficient number, since it is larger than the sum of its proper divisors (10).

14 is an equidigital number, since it uses as much as digits as its factorization.

14 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9.

The product of its digits is 4, while the sum is 5.

The square root of 14 is about 3.7416573868. The cubic root of 14 is about 2.4101422642.

Adding to 14 its reverse (41), we get a palindrome (55).

Subtracting 14 from its reverse (41), we obtain a cube (27 = 3^{3}).

The spelling of 14 in words is "fourteen", and thus it is an aban number and an iban number.

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