13921418 has 16 divisors (see below), whose sum is σ = 24635904. Its totient is φ = 5773680.

The previous prime is 13921403. The next prime is 13921423. The reversal of 13921418 is 81412931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15605 + ... + 16472.

It is an arithmetic number, because the mean of its divisors is an integer number (1539744).

Almost surely, 2^13921418 is an apocalyptic number.

13921418 is a deficient number, since it is larger than the sum of its proper divisors (10714486).

13921418 is a wasteful number, since it uses less digits than its factorization.

13921418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32117.

The product of its digits is 1728, while the sum is 29.

The square root of 13921418 is about 3731.1416483430. The cubic root of 13921418 is about 240.5624424548.

The spelling of 13921418 in words is "thirteen million, nine hundred twenty-one thousand, four hundred eighteen".