18319112 has 16 divisors (see below), whose sum is σ = 39255360. Its totient is φ = 7851024.

The previous prime is 18319069. The next prime is 18319123. The reversal of 18319112 is 21191381.

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, 163508 + ... + 163619.

It is an arithmetic number, because the mean of its divisors is an integer number (2453460).

Almost surely, 2^18319112 is an apocalyptic number.

It is an amenable number.

18319112 is an abundant number, since it is smaller than the sum of its proper divisors (20936248).

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

18319112 is a wasteful number, since it uses less digits than its factorization.

18319112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327140 (or 327136 counting only the distinct ones).

The product of its digits is 432, while the sum is 26.

The square root of 18319112 is about 4280.0831767619. The cubic root of 18319112 is about 263.6137986380.

The spelling of 18319112 in words is "eighteen million, three hundred nineteen thousand, one hundred twelve".