20902092808 has 16 divisors (see below), whose sum is σ = 39364076880. Its totient is φ = 10405005648.

The previous prime is 20902092791. The next prime is 20902092817. The reversal of 20902092808 is 80829020902.

It is a happy number.

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, 5753166 + ... + 5756797.

It is an arithmetic number, because the mean of its divisors is an integer number (2460254805).

Almost surely, 2^20902092808 is an apocalyptic number.

It is an amenable number.

20902092808 is a deficient number, since it is larger than the sum of its proper divisors (18461984072).

20902092808 is a wasteful number, since it uses less digits than its factorization.

20902092808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11510196 (or 11510192 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 20902092808 in words is "twenty billion, nine hundred two million, ninety-two thousand, eight hundred eight".