22056745728 has 144 divisors (see below), whose sum is σ = 60585680736. Its totient is φ = 7119175680.

The previous prime is 22056745703. The next prime is 22056745751. The reversal of 22056745728 is 82754765022.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4311300 + ... + 4316412.

It is an arithmetic number, because the mean of its divisors is an integer number (420733894).

Almost surely, 2^22056745728 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 22056745728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30292840368).

22056745728 is an abundant number, since it is smaller than the sum of its proper divisors (38528935008).

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

22056745728 is a wasteful number, since it uses less digits than its factorization.

22056745728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5310 (or 5296 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 48.

The spelling of 22056745728 in words is "twenty-two billion, fifty-six million, seven hundred forty-five thousand, seven hundred twenty-eight".