22212979800 has 288 divisors, whose sum is σ = 79290550080. Its totient is φ = 5100998400.

The previous prime is 22212979757. The next prime is 22212979823. The reversal of 22212979800 is 897921222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2377939 + ... + 2387261.

It is an arithmetic number, because the mean of its divisors is an integer number (275314410).

Almost surely, 2^22212979800 is an apocalyptic number.

22212979800 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 22212979800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39645275040).

22212979800 is an abundant number, since it is smaller than the sum of its proper divisors (57077570280).

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

22212979800 is a wasteful number, since it uses less digits than its factorization.

22212979800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391 (or 9363 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 22212979800 in words is "twenty-two billion, two hundred twelve million, nine hundred seventy-nine thousand, eight hundred".