18404032 has 28 divisors (see below), whose sum is σ = 36804600. Its totient is φ = 9130496.

The previous prime is 18404021. The next prime is 18404041. The reversal of 18404032 is 23040481.

It is a junction number, because it is equal to n+sod(n) for n = 18403994 and 18404012.

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, 7719 + ... + 9817.

It is an arithmetic number, because the mean of its divisors is an integer number (1314450).

Almost surely, 2^18404032 is an apocalyptic number.

It is an amenable number.

18404032 is a deficient number, since it is larger than the sum of its proper divisors (18400568).

18404032 is a wasteful number, since it uses less digits than its factorization.

18404032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248 (or 2238 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 18404032 is about 4289.9920745848. The cubic root of 18404032 is about 264.0205065185.

The spelling of 18404032 in words is "eighteen million, four hundred four thousand, thirty-two".