22520566520 has 64 divisors (see below), whose sum is σ = 52084684800. Its totient is φ = 8757365760.

The previous prime is 22520566517. The next prime is 22520566529. The reversal of 22520566520 is 2566502522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22520566529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1949321 + ... + 1960839.

It is an arithmetic number, because the mean of its divisors is an integer number (813823200).

Almost surely, 2^22520566520 is an apocalyptic number.

22520566520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22520566520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26042342400).

22520566520 is an abundant number, since it is smaller than the sum of its proper divisors (29564118280).

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

22520566520 is a wasteful number, since it uses less digits than its factorization.

22520566520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888 (or 12884 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 22520566520 in words is "twenty-two billion, five hundred twenty million, five hundred sixty-six thousand, five hundred twenty".