18904996 has 12 divisors (see below), whose sum is σ = 36091440. Its totient is φ = 8593160.

The previous prime is 18904987. The next prime is 18904997. The reversal of 18904996 is 69940981.

It is not an unprimeable number, because it can be changed into a prime (18904997) 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, 214786 + ... + 214873.

It is an arithmetic number, because the mean of its divisors is an integer number (3007620).

Almost surely, 2^18904996 is an apocalyptic number.

It is an amenable number.

18904996 is a deficient number, since it is larger than the sum of its proper divisors (17186444).

18904996 is a wasteful number, since it uses less digits than its factorization.

18904996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429674 (or 429672 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 18904996 is about 4347.9875804790. The cubic root of 18904996 is about 266.3946691872.

It can be divided in two parts, 18904 and 996, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 18904996 in words is "eighteen million, nine hundred four thousand, nine hundred ninety-six".