18916804 has 12 divisors (see below), whose sum is σ = 33248124. Its totient is φ = 9417344.

The previous prime is 18916763. The next prime is 18916811. The reversal of 18916804 is 40861981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 12616704 = 2510^2 + 3552^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9217 + ... + 11080.

It is an arithmetic number, because the mean of its divisors is an integer number (2770677).

Almost surely, 2^18916804 is an apocalyptic number.

It is an amenable number.

18916804 is a deficient number, since it is larger than the sum of its proper divisors (14331320).

18916804 is a wasteful number, since it uses less digits than its factorization.

18916804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20534 (or 20532 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18916804 is about 4349.3452380789. The cubic root of 18916804 is about 266.4501207298.

The spelling of 18916804 in words is "eighteen million, nine hundred sixteen thousand, eight hundred four".