18564056 has 16 divisors (see below), whose sum is σ = 39780240. Its totient is φ = 7956000.

The previous prime is 18564037. The next prime is 18564061. The reversal of 18564056 is 65046581.

It is a happy number.

It is a super-2 number, since 2×18564056² = 689248350342272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165695 + ... + 165806.

It is an arithmetic number, because the mean of its divisors is an integer number (2486265).

Almost surely, 2^18564056 is an apocalyptic number.

It is an amenable number.

18564056 is an abundant number, since it is smaller than the sum of its proper divisors (21216184).

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

18564056 is a wasteful number, since it uses less digits than its factorization.

18564056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331514 (or 331510 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 18564056 is about 4308.6025576746. The cubic root of 18564056 is about 264.7835232215.

The spelling of 18564056 in words is "eighteen million, five hundred sixty-four thousand, fifty-six".