20256451632 has 60 divisors (see below), whose sum is σ = 56700891000. Its totient is φ = 6750845184.

The previous prime is 20256451603. The next prime is 20256451669. The reversal of 20256451632 is 23615465202.

20256451632 is a `hidden beast` number, since 2 + 0 + 2 + 5 + 645 + 1 + 6 + 3 + 2 = 666.

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 11 ways as a sum of consecutive naturals, for example, 990244 + ... + 1010492.

It is an arithmetic number, because the mean of its divisors is an integer number (945014850).

Almost surely, 2^20256451632 is an apocalyptic number.

It is an amenable number.

20256451632 is an abundant number, since it is smaller than the sum of its proper divisors (36444439368).

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

20256451632 is a wasteful number, since it uses less digits than its factorization.

20256451632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27210 (or 27201 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 20256451632 in words is "twenty billion, two hundred fifty-six million, four hundred fifty-one thousand, six hundred thirty-two".