22501722128 has 40 divisors (see below), whose sum is σ = 44126532120. Its totient is φ = 11114726400.

The previous prime is 22501722119. The next prime is 22501722157. The reversal of 22501722128 is 82122710522.

It can be written as a sum of positive squares in 4 ways, for example, as 13836346384 + 8665375744 = 117628^2 + 93088^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22501722094 and 22501722103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723278 + ... + 753746.

It is an arithmetic number, because the mean of its divisors is an integer number (1103163303).

Almost surely, 2^22501722128 is an apocalyptic number.

It is an amenable number.

22501722128 is a deficient number, since it is larger than the sum of its proper divisors (21624809992).

22501722128 is a wasteful number, since it uses less digits than its factorization.

22501722128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31035 (or 31029 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 22501722128 in words is "twenty-two billion, five hundred one million, seven hundred twenty-two thousand, one hundred twenty-eight".