22137979500 has 432 divisors, whose sum is σ = 87500623392. Its totient is φ = 4670265600.

The previous prime is 22137979483. The next prime is 22137979537. The reversal of 22137979500 is 597973122.

22137979500 is a `hidden beast` number, since 2 + 2 + 1 + 3 + 79 + 79 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2862639 + ... + 2870361.

Almost surely, 2^22137979500 is an apocalyptic number.

22137979500 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 22137979500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43750311696).

22137979500 is an abundant number, since it is smaller than the sum of its proper divisors (65362643892).

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

22137979500 is a wasteful number, since it uses less digits than its factorization.

22137979500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7775 (or 7753 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 22137979500 in words is "twenty-two billion, one hundred thirty-seven million, nine hundred seventy-nine thousand, five hundred".