20651622912 has 270 divisors, whose sum is σ = 62585266887. Its totient is φ = 6555451392.

The previous prime is 20651622907. The next prime is 20651622931. The reversal of 20651622912 is 21922615602.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

20651622912 is a `hidden beast` number, since 20 + 6 + 5 + 1 + 622 + 9 + 1 + 2 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 12219975936 + 8431646976 = 110544^2 + 91824^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=101616.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 282898908 + ... + 282898980.

Almost surely, 2^20651622912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20651622912

20651622912 is an abundant number, since it is smaller than the sum of its proper divisors (41933643975).

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

20651622912 is an frugal number, since it uses more digits than its factorization.

20651622912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 20651622912 in words is "twenty billion, six hundred fifty-one million, six hundred twenty-two thousand, nine hundred twelve".