21627076672 has 56 divisors (see below), whose sum is σ = 43393153752. Its totient is φ = 10693632000.

The previous prime is 21627076657. The next prime is 21627076693. The reversal of 21627076672 is 27667072612.

It can be written as a sum of positive squares in 4 ways, for example, as 12810617856 + 8816458816 = 113184^2 + 93896^2 .

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, 7632568 + ... + 7635400.

Almost surely, 2^21627076672 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 21627076672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21696576876).

21627076672 is an abundant number, since it is smaller than the sum of its proper divisors (21766077080).

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

21627076672 is a wasteful number, since it uses less digits than its factorization.

21627076672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127 (or 4117 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 21627076672 in words is "twenty-one billion, six hundred twenty-seven million, seventy-six thousand, six hundred seventy-two".