21552622708 has 12 divisors (see below), whose sum is σ = 37718323300. Its totient is φ = 10775958912.

The previous prime is 21552622703. The next prime is 21552622709. The reversal of 21552622708 is 80722625512.

It can be written as a sum of positive squares in 2 ways, for example, as 9899852004 + 11652770704 = 99498^2 + 107948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552622703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89068 + ... + 225916.

Almost surely, 2^21552622708 is an apocalyptic number.

It is an amenable number.

21552622708 is a deficient number, since it is larger than the sum of its proper divisors (16165700592).

21552622708 is a wasteful number, since it uses less digits than its factorization.

21552622708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176226 (or 176224 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 21552622708 in words is "twenty-one billion, five hundred fifty-two million, six hundred twenty-two thousand, seven hundred eight".