22021520520 has 64 divisors (see below), whose sum is σ = 69950718720. Its totient is φ = 5526969344.

The previous prime is 22021520519. The next prime is 22021520551. The reversal of 22021520520 is 2502512022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5395392 + ... + 5399471.

It is an arithmetic number, because the mean of its divisors is an integer number (1092979980).

Almost surely, 2^22021520520 is an apocalyptic number.

22021520520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021520520 is an abundant number, since it is smaller than the sum of its proper divisors (47929198200).

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

22021520520 is a wasteful number, since it uses less digits than its factorization.

22021520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10794894 (or 10794890 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The spelling of 22021520520 in words is "twenty-two billion, twenty-one million, five hundred twenty thousand, five hundred twenty".