18040564 has 24 divisors (see below), whose sum is σ = 32931360. Its totient is φ = 8639904.

The previous prime is 18040559. The next prime is 18040591. The reversal of 18040564 is 46504081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8127 + ... + 10105.

It is an arithmetic number, because the mean of its divisors is an integer number (1372140).

Almost surely, 2^18040564 is an apocalyptic number.

It is an amenable number.

18040564 is a deficient number, since it is larger than the sum of its proper divisors (14890796).

18040564 is a wasteful number, since it uses less digits than its factorization.

18040564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079 (or 2077 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 18040564 is about 4247.4185101071. The cubic root of 18040564 is about 262.2708579337.

The spelling of 18040564 in words is "eighteen million, forty thousand, five hundred sixty-four".