22022191872 has 252 divisors, whose sum is σ = 66352532400. Its totient is φ = 7291275264.

The previous prime is 22022191837. The next prime is 22022191903. The reversal of 22022191872 is 27819122022.

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

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 36764629 + ... + 36765227.

It is an arithmetic number, because the mean of its divisors is an integer number (263303700).

Almost surely, 2^22022191872 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 22022191872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33176266200).

22022191872 is an abundant number, since it is smaller than the sum of its proper divisors (44330340528).

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

22022191872 is an frugal number, since it uses more digits than its factorization.

22022191872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 22022191872 in words is "twenty-two billion, twenty-two million, one hundred ninety-one thousand, eight hundred seventy-two".