22918375872 has 168 divisors, whose sum is σ = 77856827776. Its totient is φ = 6548076288.

The previous prime is 22918375859. The next prime is 22918375873. The reversal of 22918375872 is 27857381922.

22918375872 is a `hidden beast` number, since 2 + 29 + 1 + 8 + 37 + 587 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×22918375872² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22918375873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3603 + ... + 214125.

Almost surely, 2^22918375872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22918375872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38928413888).

22918375872 is an abundant number, since it is smaller than the sum of its proper divisors (54938451904).

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

22918375872 is an equidigital number, since it uses as much as digits as its factorization.

22918375872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210557 (or 210535 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 22918375872 in words is "twenty-two billion, nine hundred eighteen million, three hundred seventy-five thousand, eight hundred seventy-two".