18716864 has 28 divisors (see below), whose sum is σ = 39328344. Its totient is φ = 8807424.

The previous prime is 18716849. The next prime is 18716899. The reversal of 18716864 is 46861781.

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, 7514 + ... + 9689.

Almost surely, 2^18716864 is an apocalyptic number.

It is an amenable number.

18716864 is an abundant number, since it is smaller than the sum of its proper divisors (20611480).

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

18716864 is a wasteful number, since it uses less digits than its factorization.

18716864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17232 (or 17222 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 18716864 is about 4326.2991112497. The cubic root of 18716864 is about 265.5080511057.

The spelling of 18716864 in words is "eighteen million, seven hundred sixteen thousand, eight hundred sixty-four".