18212044 has 12 divisors (see below), whose sum is σ = 33256944. Its totient is φ = 8710064.

The previous prime is 18212027. The next prime is 18212057. The reversal of 18212044 is 44021281.

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, 98887 + ... + 99070.

It is an arithmetic number, because the mean of its divisors is an integer number (2771412).

Almost surely, 2^18212044 is an apocalyptic number.

It is an amenable number.

18212044 is a deficient number, since it is larger than the sum of its proper divisors (15044900).

18212044 is a wasteful number, since it uses less digits than its factorization.

18212044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197984 (or 197982 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 18212044 is about 4267.5571466590. The cubic root of 18212044 is about 263.0992218640.

The spelling of 18212044 in words is "eighteen million, two hundred twelve thousand, forty-four".