18908199504 has 60 divisors (see below), whose sum is σ = 52953024852. Its totient is φ = 6298406400.

The previous prime is 18908199473. The next prime is 18908199533. The reversal of 18908199504 is 40599180981.

It can be written as a sum of positive squares in 2 ways, for example, as 2575359504 + 16332840000 = 50748^2 + 127800^2 .

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 11 ways as a sum of consecutive naturals, for example, 168934 + ... + 257594.

Almost surely, 2^18908199504 is an apocalyptic number.

It is an amenable number.

18908199504 is an abundant number, since it is smaller than the sum of its proper divisors (34044825348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18908199504 is a wasteful number, since it uses less digits than its factorization.

18908199504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90156 (or 90147 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 18908199504 in words is "eighteen billion, nine hundred eight million, one hundred ninety-nine thousand, five hundred four".