18500272 has 20 divisors (see below), whose sum is σ = 40965136. Its totient is φ = 7928640.

The previous prime is 18500249. The next prime is 18500291. The reversal of 18500272 is 27200581.

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, 82479 + ... + 82702.

Almost surely, 2^18500272 is an apocalyptic number.

It is an amenable number.

18500272 is an abundant number, since it is smaller than the sum of its proper divisors (22464864).

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

18500272 is a wasteful number, since it uses less digits than its factorization.

18500272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165196 (or 165190 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18500272 is about 4301.1942527628. The cubic root of 18500272 is about 264.4799198119.

The spelling of 18500272 in words is "eighteen million, five hundred thousand, two hundred seventy-two".