20426648808 has 16 divisors (see below), whose sum is σ = 51066622080. Its totient is φ = 6808882928.

The previous prime is 20426648791. The next prime is 20426648813. The reversal of 20426648808 is 80884662402.

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, 425555160 + ... + 425555207.

It is an arithmetic number, because the mean of its divisors is an integer number (3191663880).

Almost surely, 2^20426648808 is an apocalyptic number.

It is an amenable number.

20426648808 is an abundant number, since it is smaller than the sum of its proper divisors (30639973272).

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

20426648808 is a wasteful number, since it uses less digits than its factorization.

20426648808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851110376 (or 851110372 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 20426648808 in words is "twenty billion, four hundred twenty-six million, six hundred forty-eight thousand, eight hundred eight".