21670626672 has 60 divisors (see below), whose sum is σ = 60755606184. Its totient is φ = 7210684800.

The previous prime is 21670626667. The next prime is 21670626683. The reversal of 21670626672 is 27662607612.

21670626672 is a `hidden beast` number, since 2 + 16 + 7 + 0 + 626 + 6 + 7 + 2 = 666.

It is a congruent number.

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, 52579 + ... + 214722.

Almost surely, 2^21670626672 is an apocalyptic number.

It is an amenable number.

21670626672 is an abundant number, since it is smaller than the sum of its proper divisors (39084979512).

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

21670626672 is a wasteful number, since it uses less digits than its factorization.

21670626672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267878 (or 267869 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 21670626672 in words is "twenty-one billion, six hundred seventy million, six hundred twenty-six thousand, six hundred seventy-two".