21722652396 has 36 divisors (see below), whose sum is σ = 54973743552. Its totient is φ = 7232483424.

The previous prime is 21722652361. The next prime is 21722652433. The reversal of 21722652396 is 69325622712.

21722652396 is a `hidden beast` number, since 2 + 17 + 2 + 26 + 523 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318531 + ... + 380666.

It is an arithmetic number, because the mean of its divisors is an integer number (1527048432).

Almost surely, 2^21722652396 is an apocalyptic number.

It is an amenable number.

21722652396 is an abundant number, since it is smaller than the sum of its proper divisors (33251091156).

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

21722652396 is a wasteful number, since it uses less digits than its factorization.

21722652396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700070 (or 700065 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 21722652396 in words is "twenty-one billion, seven hundred twenty-two million, six hundred fifty-two thousand, three hundred ninety-six".