18330872 has 16 divisors (see below), whose sum is σ = 39280560. Its totient is φ = 7856064.

The previous prime is 18330859. The next prime is 18330881. The reversal of 18330872 is 27803381.

It is a congruent number.

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, 163613 + ... + 163724.

It is an arithmetic number, because the mean of its divisors is an integer number (2455035).

Almost surely, 2^18330872 is an apocalyptic number.

It is an amenable number.

18330872 is an abundant number, since it is smaller than the sum of its proper divisors (20949688).

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

18330872 is a wasteful number, since it uses less digits than its factorization.

18330872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327350 (or 327346 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18330872 is about 4281.4567614306. The cubic root of 18330872 is about 263.6701957519.

The spelling of 18330872 in words is "eighteen million, three hundred thirty thousand, eight hundred seventy-two".