18093312 has 54 divisors (see below), whose sum is σ = 52174122. Its totient is φ = 6030336.

The previous prime is 18093307. The next prime is 18093331. The reversal of 18093312 is 21339081.

It can be written as a sum of positive squares in only one way, i.e., 10342656 + 7750656 = 3216^2 + 2784^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1623 + ... + 6230.

Almost surely, 2^18093312 is an apocalyptic number.

18093312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18093312 is an abundant number, since it is smaller than the sum of its proper divisors (34080810).

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

18093312 is an equidigital number, since it uses as much as digits as its factorization.

18093312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875 (or 7858 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18093312 is about 4253.6233965879. The cubic root of 18093312 is about 262.5262232306.

The spelling of 18093312 in words is "eighteen million, ninety-three thousand, three hundred twelve".