18866044 has 6 divisors (see below), whose sum is σ = 33015584. Its totient is φ = 9433020.

The previous prime is 18866033. The next prime is 18866051. The reversal of 18866044 is 44066881.

It is a junction number, because it is equal to n+sod(n) for n = 18865994 and 18866012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2358252 + ... + 2358259.

Almost surely, 2^18866044 is an apocalyptic number.

It is an amenable number.

18866044 is a deficient number, since it is larger than the sum of its proper divisors (14149540).

18866044 is a wasteful number, since it uses less digits than its factorization.

18866044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716515 (or 4716513 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 18866044 is about 4343.5059571733. The cubic root of 18866044 is about 266.2115828397.

The spelling of 18866044 in words is "eighteen million, eight hundred sixty-six thousand, forty-four".