22579828721 has 2 divisors, whose sum is σ = 22579828722. Its totient is φ = 22579828720.

The previous prime is 22579828673. The next prime is 22579828751. The reversal of 22579828721 is 12782897522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22346961121 + 232867600 = 149489^2 + 15260^2 .

It is a cyclic number.

It is not a de Polignac number, because 22579828721 - 2⁶ = 22579828657 is a prime.

It is not a weakly prime, because it can be changed into another prime (22579828751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11289914360 + 11289914361.

It is an arithmetic number, because the mean of its divisors is an integer number (11289914361).

Almost surely, 2^22579828721 is an apocalyptic number.

It is an amenable number.

22579828721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22579828721 is an equidigital number, since it uses as much as digits as its factorization.

22579828721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 53.

The spelling of 22579828721 in words is "twenty-two billion, five hundred seventy-nine million, eight hundred twenty-eight thousand, seven hundred twenty-one".