18436144 has 20 divisors (see below), whose sum is σ = 36225360. Its totient is φ = 9087680.

The previous prime is 18436123. The next prime is 18436153. The reversal of 18436144 is 44163481.

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, 6979 + ... + 9250.

It is an arithmetic number, because the mean of its divisors is an integer number (1811268).

Almost surely, 2^18436144 is an apocalyptic number.

It is an amenable number.

18436144 is a deficient number, since it is larger than the sum of its proper divisors (17789216).

18436144 is a wasteful number, since it uses less digits than its factorization.

18436144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16308 (or 16302 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 18436144 is about 4293.7331076815. The cubic root of 18436144 is about 264.1739747050.

The spelling of 18436144 in words is "eighteen million, four hundred thirty-six thousand, one hundred forty-four".