20651655104 has 56 divisors (see below), whose sum is σ = 45013107840. Its totient is φ = 9357030144.

The previous prime is 20651655083. The next prime is 20651655119. The reversal of 20651655104 is 40155615602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341234 + ... + 397169.

Almost surely, 2^20651655104 is an apocalyptic number.

It is an amenable number.

20651655104 is an abundant number, since it is smaller than the sum of its proper divisors (24361452736).

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

20651655104 is a wasteful number, since it uses less digits than its factorization.

20651655104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738457 (or 738447 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 20651655104 in words is "twenty billion, six hundred fifty-one million, six hundred fifty-five thousand, one hundred four".