18930904 has 16 divisors (see below), whose sum is σ = 35548200. Its totient is φ = 9451392.

The previous prime is 18930893. The next prime is 18930907. The reversal of 18930904 is 40903981.

It is a self number, because there is not a number n which added to its sum of digits gives 18930904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18930907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5952 + ... + 8560.

Almost surely, 2^18930904 is an apocalyptic number.

It is an amenable number.

18930904 is a deficient number, since it is larger than the sum of its proper divisors (16617296).

18930904 is a wasteful number, since it uses less digits than its factorization.

18930904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3518 counting only the distinct ones).

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

The square root of 18930904 is about 4350.9658697811. The cubic root of 18930904 is about 266.5163055119.

The spelling of 18930904 in words is "eighteen million, nine hundred thirty thousand, nine hundred four".