18093904 has 20 divisors (see below), whose sum is σ = 35178676. Its totient is φ = 9015552.

The previous prime is 18093827. The next prime is 18093931. The reversal of 18093904 is 40939081.

It can be written as a sum of positive squares in 2 ways, for example, as 48400 + 18045504 = 220^2 + 4248^2 .

It is a super-2 number, since 2×18093904² = 654778723922432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18093904.

It is a congruent number.

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, 3202 + ... + 6814.

Almost surely, 2^18093904 is an apocalyptic number.

It is an amenable number.

18093904 is a deficient number, since it is larger than the sum of its proper divisors (17084772).

18093904 is a wasteful number, since it uses less digits than its factorization.

18093904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18093904 is about 4253.6929837495. The cubic root of 18093904 is about 262.5290864217.

The spelling of 18093904 in words is "eighteen million, ninety-three thousand, nine hundred four".