22544185820 has 24 divisors (see below), whose sum is σ = 50984543904. Its totient is φ = 8324006976.

The previous prime is 22544185819. The next prime is 22544185823. The reversal of 22544185820 is 2858144522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22544185823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43353944 + ... + 43354463.

It is an arithmetic number, because the mean of its divisors is an integer number (2124355996).

Almost surely, 2^22544185820 is an apocalyptic number.

22544185820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22544185820 is an abundant number, since it is smaller than the sum of its proper divisors (28440358084).

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

22544185820 is a wasteful number, since it uses less digits than its factorization.

22544185820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86708429 (or 86708427 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 41.

The spelling of 22544185820 in words is "twenty-two billion, five hundred forty-four million, one hundred eighty-five thousand, eight hundred twenty".