18065872 has 20 divisors (see below), whose sum is σ = 38185056. Its totient is φ = 8211680.

The previous prime is 18065857. The next prime is 18065881. The reversal of 18065872 is 27856081.

It is a super-2 number, since 2×18065872² = 652751462240768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51148 + ... + 51499.

Almost surely, 2^18065872 is an apocalyptic number.

It is an amenable number.

18065872 is an abundant number, since it is smaller than the sum of its proper divisors (20119184).

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

18065872 is a wasteful number, since it uses less digits than its factorization.

18065872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102666 (or 102660 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 18065872 is about 4250.3966873693. The cubic root of 18065872 is about 262.3934418597.

The spelling of 18065872 in words is "eighteen million, sixty-five thousand, eight hundred seventy-two".