18805902508 has 12 divisors (see below), whose sum is σ = 33201572040. Its totient is φ = 9319739072.

The previous prime is 18805902491. The next prime is 18805902523. The reversal of 18805902508 is 80520950881.

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, 20802538 + ... + 20803441.

It is an arithmetic number, because the mean of its divisors is an integer number (2766797670).

Almost surely, 2^18805902508 is an apocalyptic number.

It is an amenable number.

18805902508 is a deficient number, since it is larger than the sum of its proper divisors (14395669532).

18805902508 is a wasteful number, since it uses less digits than its factorization.

18805902508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41606096 (or 41606094 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 46.

The spelling of 18805902508 in words is "eighteen billion, eight hundred five million, nine hundred two thousand, five hundred eight".