20651388112 has 20 divisors (see below), whose sum is σ = 42365715876. Its totient is φ = 9718300160.

The previous prime is 20651388073. The next prime is 20651388187. The reversal of 20651388112 is 21188315602.

It can be written as a sum of positive squares in 2 ways, for example, as 12641854096 + 8009534016 = 112436^2 + 89496^2 .

It is a congruent 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, 37961839 + ... + 37962382.

Almost surely, 2^20651388112 is an apocalyptic number.

It is an amenable number.

20651388112 is an abundant number, since it is smaller than the sum of its proper divisors (21714327764).

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

20651388112 is a wasteful number, since it uses less digits than its factorization.

20651388112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75924246 (or 75924240 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 20651388112 in words is "twenty billion, six hundred fifty-one million, three hundred eighty-eight thousand, one hundred twelve".