18814564 has 12 divisors (see below), whose sum is σ = 33691504. Its totient is φ = 9188424.

The previous prime is 18814513. The next prime is 18814571. The reversal of 18814564 is 46541881.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 54522 + ... + 54865.

Almost surely, 2^18814564 is an apocalyptic number.

It is an amenable number.

18814564 is a deficient number, since it is larger than the sum of its proper divisors (14876940).

18814564 is a wasteful number, since it uses less digits than its factorization.

18814564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109434 (or 109432 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 18814564 is about 4337.5758206630. The cubic root of 18814564 is about 265.9692240196.

The spelling of 18814564 in words is "eighteen million, eight hundred fourteen thousand, five hundred sixty-four".