22561887500 has 36 divisors (see below), whose sum is σ = 49350997584. Its totient is φ = 9024750000.

The previous prime is 22561887479. The next prime is 22561887521. The reversal of 22561887500 is 578816522.

It is an interprime number because it is at equal distance from previous prime (22561887479) and next prime (22561887521).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 889976 + ... + 914975.

It is an arithmetic number, because the mean of its divisors is an integer number (1370861044).

Almost surely, 2^22561887500 is an apocalyptic number.

22561887500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22561887500 is an abundant number, since it is smaller than the sum of its proper divisors (26789110084).

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

22561887500 is an equidigital number, since it uses as much as digits as its factorization.

22561887500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804980 (or 1804958 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 22561887500 in words is "twenty-two billion, five hundred sixty-one million, eight hundred eighty-seven thousand, five hundred".