18349872 has 40 divisors (see below), whose sum is σ = 48304944. Its totient is φ = 6000384.

The previous prime is 18349867. The next prime is 18349873. The reversal of 18349872 is 27894381.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18349873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1063 + ... + 6150.

Almost surely, 2^18349872 is an apocalyptic number.

18349872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18349872 is an abundant number, since it is smaller than the sum of its proper divisors (29955072).

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

18349872 is a wasteful number, since it uses less digits than its factorization.

18349872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7277 (or 7271 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 18349872 is about 4283.6750577045. The cubic root of 18349872 is about 263.7612625934.

The spelling of 18349872 in words is "eighteen million, three hundred forty-nine thousand, eight hundred seventy-two".