18066864 has 20 divisors (see below), whose sum is σ = 46672856. Its totient is φ = 6022272.

The previous prime is 18066857. The next prime is 18066871. The reversal of 18066864 is 46866081.

It is an interprime number because it is at equal distance from previous prime (18066857) and next prime (18066871).

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, 188149 + ... + 188244.

Almost surely, 2^18066864 is an apocalyptic number.

It is an amenable number.

18066864 is an abundant number, since it is smaller than the sum of its proper divisors (28605992).

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

18066864 is a wasteful number, since it uses less digits than its factorization.

18066864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376404 (or 376398 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 18066864 is about 4250.5133807577. The cubic root of 18066864 is about 262.3982444608.

The spelling of 18066864 in words is "eighteen million, sixty-six thousand, eight hundred sixty-four".