18500548904 has 16 divisors (see below), whose sum is σ = 35078289300. Its totient is φ = 9146338432.

The previous prime is 18500548879. The next prime is 18500548943. The reversal of 18500548904 is 40984500581.

It can be written as a sum of positive squares in 2 ways, for example, as 14301768100 + 4198780804 = 119590^2 + 64798^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12991247 + ... + 12992670.

Almost surely, 2^18500548904 is an apocalyptic number.

It is an amenable number.

18500548904 is a deficient number, since it is larger than the sum of its proper divisors (16577740396).

18500548904 is a wasteful number, since it uses less digits than its factorization.

18500548904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25984012 (or 25984008 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 18500548904 in words is "eighteen billion, five hundred million, five hundred forty-eight thousand, nine hundred four".