18424904 has 16 divisors (see below), whose sum is σ = 34610220. Its totient is φ = 9195520.

The previous prime is 18424897. The next prime is 18424907. The reversal of 18424904 is 40942481.

It can be written as a sum of positive squares in 2 ways, for example, as 18062500 + 362404 = 4250^2 + 602^2 .

It is not an unprimeable number, because it can be changed into a prime (18424907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3332 + ... + 6924.

Almost surely, 2^18424904 is an apocalyptic number.

It is an amenable number.

18424904 is a deficient number, since it is larger than the sum of its proper divisors (16185316).

18424904 is a wasteful number, since it uses less digits than its factorization.

18424904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240 (or 4236 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18424904 is about 4292.4240237889. The cubic root of 18424904 is about 264.1202773028.

The spelling of 18424904 in words is "eighteen million, four hundred twenty-four thousand, nine hundred four".