22505596321 has 6 divisors (see below), whose sum is σ = 24369965430. Its totient is φ = 20774396448.

The previous prime is 22505596313. The next prime is 22505596327. The reversal of 22505596321 is 12369550522.

It can be written as a sum of positive squares in 3 ways, for example, as 684397921 + 21821198400 = 26161^2 + 147720^2 .

It is not a de Polignac number, because 22505596321 - 2³ = 22505596313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22505596327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66584436 + ... + 66584773.

It is an arithmetic number, because the mean of its divisors is an integer number (4061660905).

Almost surely, 2^22505596321 is an apocalyptic number.

It is an amenable number.

22505596321 is a deficient number, since it is larger than the sum of its proper divisors (1864369109).

22505596321 is a wasteful number, since it uses less digits than its factorization.

22505596321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133169235 (or 133169222 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 22505596321 in words is "twenty-two billion, five hundred five million, five hundred ninety-six thousand, three hundred twenty-one".