22055812920 has 256 divisors, whose sum is σ = 78285916800. Its totient is φ = 5504163840.

The previous prime is 22055812913. The next prime is 22055812931. The reversal of 22055812920 is 2921855022.

22055812920 is a `hidden beast` number, since 2 + 2 + 0 + 558 + 12 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3319842 + ... + 3326478.

Almost surely, 2^22055812920 is an apocalyptic number.

22055812920 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 22055812920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39142958400).

22055812920 is an abundant number, since it is smaller than the sum of its proper divisors (56230103880).

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

22055812920 is a wasteful number, since it uses less digits than its factorization.

22055812920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6855 (or 6845 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 22055812920 in words is "twenty-two billion, fifty-five million, eight hundred twelve thousand, nine hundred twenty".