18975864 has 32 divisors (see below), whose sum is σ = 47866320. Its totient is φ = 6268416.

The previous prime is 18975833. The next prime is 18975871. The reversal of 18975864 is 46857981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787 + ... + 6210.

Almost surely, 2^18975864 is an apocalyptic number.

It is an amenable number.

18975864 is an abundant number, since it is smaller than the sum of its proper divisors (28890456).

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

18975864 is a wasteful number, since it uses less digits than its factorization.

18975864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7119 (or 7115 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 18975864 is about 4356.1294746598. The cubic root of 18975864 is about 266.7271265690.

The spelling of 18975864 in words is "eighteen million, nine hundred seventy-five thousand, eight hundred sixty-four".