22165232520 has 64 divisors (see below), whose sum is σ = 66583811520. Its totient is φ = 5902896384.

The previous prime is 22165232497. The next prime is 22165232539. The reversal of 22165232520 is 2523256122.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 31162 + ... + 212841.

It is an arithmetic number, because the mean of its divisors is an integer number (1040372055).

Almost surely, 2^22165232520 is an apocalyptic number.

22165232520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22165232520 is an abundant number, since it is smaller than the sum of its proper divisors (44418579000).

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

22165232520 is a wasteful number, since it uses less digits than its factorization.

22165232520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244774 (or 244770 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 22165232520 its reverse (2523256122), we get a palindrome (24688488642).

The spelling of 22165232520 in words is "twenty-two billion, one hundred sixty-five million, two hundred thirty-two thousand, five hundred twenty".