18906604 has 12 divisors (see below), whose sum is σ = 33130944. Its totient is φ = 9440624.

The previous prime is 18906599. The next prime is 18906659. The reversal of 18906604 is 40660981.

It is a self number, because there is not a number n which added to its sum of digits gives 18906604.

It is a congruent number.

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, 714 + ... + 6190.

It is an arithmetic number, because the mean of its divisors is an integer number (2760912).

Almost surely, 2^18906604 is an apocalyptic number.

It is an amenable number.

18906604 is a deficient number, since it is larger than the sum of its proper divisors (14224340).

18906604 is a wasteful number, since it uses less digits than its factorization.

18906604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344 (or 6342 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 18906604 is about 4348.1724896789. The cubic root of 18906604 is about 266.4022218730.

The spelling of 18906604 in words is "eighteen million, nine hundred six thousand, six hundred four".