21625706576 has 40 divisors (see below), whose sum is σ = 43749908160. Its totient is φ = 10336018176.

The previous prime is 21625706573. The next prime is 21625706617. The reversal of 21625706576 is 67560752612.

It is a super-2 number, since 2×21625706576² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21625706576.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21625706573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573851 + ... + 610373.

It is an arithmetic number, because the mean of its divisors is an integer number (1093747704).

Almost surely, 2^21625706576 is an apocalyptic number.

It is an amenable number.

21625706576 is an abundant number, since it is smaller than the sum of its proper divisors (22124201584).

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

21625706576 is a wasteful number, since it uses less digits than its factorization.

21625706576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38163 (or 38157 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 21625706576 in words is "twenty-one billion, six hundred twenty-five million, seven hundred six thousand, five hundred seventy-six".