18868836 has 24 divisors (see below), whose sum is σ = 50317120. Its totient is φ = 5391072.

The previous prime is 18868831. The next prime is 18868859. The reversal of 18868836 is 63886881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18868831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112231 + ... + 112398.

Almost surely, 2^18868836 is an apocalyptic number.

It is an amenable number.

18868836 is an abundant number, since it is smaller than the sum of its proper divisors (31448284).

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

18868836 is a wasteful number, since it uses less digits than its factorization.

18868836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224643 (or 224641 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 18868836 is about 4343.8273446351. The cubic root of 18868836 is about 266.2247144759.

The spelling of 18868836 in words is "eighteen million, eight hundred sixty-eight thousand, eight hundred thirty-six".