18536664 has 32 divisors (see below), whose sum is σ = 49068720. Its totient is φ = 5815296.

The previous prime is 18536641. The next prime is 18536669. The reversal of 18536664 is 46663581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18536669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22309 + ... + 23124.

Almost surely, 2^18536664 is an apocalyptic number.

It is an amenable number.

18536664 is an abundant number, since it is smaller than the sum of its proper divisors (30532056).

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

18536664 is a wasteful number, since it uses less digits than its factorization.

18536664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45459 (or 45455 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 18536664 is about 4305.4226273387. The cubic root of 18536664 is about 264.6532262553.

The spelling of 18536664 in words is "eighteen million, five hundred thirty-six thousand, six hundred sixty-four".