18404332 has 12 divisors (see below), whose sum is σ = 32462080. Its totient is φ = 9129456.

The previous prime is 18404329. The next prime is 18404341. The reversal of 18404332 is 23340481.

It is a junction number, because it is equal to n+sod(n) for n = 18404297 and 18404306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17607 + ... + 18622.

Almost surely, 2^18404332 is an apocalyptic number.

It is an amenable number.

18404332 is a deficient number, since it is larger than the sum of its proper divisors (14057748).

18404332 is a wasteful number, since it uses less digits than its factorization.

18404332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36360 (or 36358 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 18404332 is about 4290.0270395418. The cubic root of 18404332 is about 264.0219410904.

The spelling of 18404332 in words is "eighteen million, four hundred four thousand, three hundred thirty-two".