13539918 has 32 divisors (see below), whose sum is σ = 31138560. Its totient is φ = 3844800.

The previous prime is 13539907. The next prime is 13539919. The reversal of 13539918 is 81993531.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13539919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6618 + ... + 8418.

It is an arithmetic number, because the mean of its divisors is an integer number (973080).

Almost surely, 2^13539918 is an apocalyptic number.

13539918 is an abundant number, since it is smaller than the sum of its proper divisors (17598642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13539918 is a wasteful number, since it uses less digits than its factorization.

13539918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992.

The product of its digits is 29160, while the sum is 39.

The square root of 13539918 is about 3679.6627562862. The cubic root of 13539918 is about 238.3446152852.

The spelling of 13539918 in words is "thirteen million, five hundred thirty-nine thousand, nine hundred eighteen".