12918993808 has 20 divisors (see below), whose sum is σ = 28606343680. Its totient is φ = 5536711584.

The previous prime is 12918993799. The next prime is 12918993869. The reversal of 12918993808 is 80839981921.

It is a super-2 number, since 2×12918993808² (a number of 21 digits) contains 22 as substring.

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, 57673968 + ... + 57674191.

It is an arithmetic number, because the mean of its divisors is an integer number (1430317184).

Almost surely, 2^12918993808 is an apocalyptic number.

It is an amenable number.

12918993808 is an abundant number, since it is smaller than the sum of its proper divisors (15687349872).

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

12918993808 is a wasteful number, since it uses less digits than its factorization.

12918993808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115348174 (or 115348168 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 58.

The spelling of 12918993808 in words is "twelve billion, nine hundred eighteen million, nine hundred ninety-three thousand, eight hundred eight".