21322062720 has 192 divisors, whose sum is σ = 84146156640. Its totient is φ = 4873605120.

The previous prime is 21322062709. The next prime is 21322062733. The reversal of 21322062720 is 2726022312.

21322062720 is a `hidden beast` number, since 2 + 1 + 32 + 2 + 0 + 627 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×21322062720² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224091 + ... + 304730.

Almost surely, 2^21322062720 is an apocalyptic number.

21322062720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322062720 is an abundant number, since it is smaller than the sum of its proper divisors (62824093920).

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

21322062720 is a wasteful number, since it uses less digits than its factorization.

21322062720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528853 (or 528838 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The spelling of 21322062720 in words is "twenty-one billion, three hundred twenty-two million, sixty-two thousand, seven hundred twenty".