12920492808 has 48 divisors (see below), whose sum is σ = 35016918300. Its totient is φ = 4303887360.

The previous prime is 12920492791. The next prime is 12920492867. The reversal of 12920492808 is 80829402921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12890877444 + 29615364 = 113538^2 + 5442^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46048 + ... + 167216.

Almost surely, 2^12920492808 is an apocalyptic number.

12920492808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12920492808 is an abundant number, since it is smaller than the sum of its proper divisors (22096425492).

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

12920492808 is a wasteful number, since it uses less digits than its factorization.

12920492808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122662 (or 122655 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 12920492808 in words is "twelve billion, nine hundred twenty million, four hundred ninety-two thousand, eight hundred eight".