18404912 has 20 divisors (see below), whose sum is σ = 35816160. Its totient is φ = 9162048.

The previous prime is 18404891. The next prime is 18404921. The reversal of 18404912 is 21940481.

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, 1418 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (1790808).

Almost surely, 2^18404912 is an apocalyptic number.

It is an amenable number.

18404912 is a deficient number, since it is larger than the sum of its proper divisors (17411248).

18404912 is a wasteful number, since it uses less digits than its factorization.

18404912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060 (or 5054 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18404912 is about 4290.0946376508. The cubic root of 18404912 is about 264.0247145519.

The spelling of 18404912 in words is "eighteen million, four hundred four thousand, nine hundred twelve".