18256113 has 12 divisors (see below), whose sum is σ = 27921348. Its totient is φ = 11454720.

The previous prime is 18256097. The next prime is 18256153. The reversal of 18256113 is 31165281.

It can be written as a sum of positive squares in 2 ways, for example, as 15186609 + 3069504 = 3897^2 + 1752^2 .

It is not a de Polignac number, because 18256113 - 2⁴ = 18256097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18256153) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 59508 + ... + 59813.

It is an arithmetic number, because the mean of its divisors is an integer number (2326779).

Almost surely, 2^18256113 is an apocalyptic number.

It is an amenable number.

18256113 is a deficient number, since it is larger than the sum of its proper divisors (9665235).

18256113 is a wasteful number, since it uses less digits than its factorization.

18256113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119344 (or 119341 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 18256113 is about 4272.7172852881. The cubic root of 18256113 is about 263.3112643294.

The spelling of 18256113 in words is "eighteen million, two hundred fifty-six thousand, one hundred thirteen".