18396872 has 32 divisors (see below), whose sum is σ = 38767680. Its totient is φ = 8120640.

The previous prime is 18396869. The next prime is 18396893. The reversal of 18396872 is 27869381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1454 + ... + 6237.

It is an arithmetic number, because the mean of its divisors is an integer number (1211490).

Almost surely, 2^18396872 is an apocalyptic number.

It is an amenable number.

18396872 is an abundant number, since it is smaller than the sum of its proper divisors (20370808).

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

18396872 is a wasteful number, since it uses less digits than its factorization.

18396872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733 (or 7729 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 18396872 is about 4289.1574930282. The cubic root of 18396872 is about 263.9862634420.

The spelling of 18396872 in words is "eighteen million, three hundred ninety-six thousand, eight hundred seventy-two".