18688364 has 12 divisors (see below), whose sum is σ = 32922288. Its totient is φ = 9282000.

The previous prime is 18688357. The next prime is 18688391. The reversal of 18688364 is 46388681.

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, 14867 + ... + 16074.

It is an arithmetic number, because the mean of its divisors is an integer number (2743524).

Almost surely, 2^18688364 is an apocalyptic number.

It is an amenable number.

18688364 is a deficient number, since it is larger than the sum of its proper divisors (14233924).

18688364 is a wasteful number, since it uses less digits than its factorization.

18688364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31096 (or 31094 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 18688364 is about 4323.0040481128. The cubic root of 18688364 is about 265.3732204092.

The spelling of 18688364 in words is "eighteen million, six hundred eighty-eight thousand, three hundred sixty-four".