20221998568589 has 2 divisors, whose sum is σ = 20221998568590. Its totient is φ = 20221998568588.

The previous prime is 20221998568553. The next prime is 20221998568631. The reversal of 20221998568589 is 98586589912202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19723520207689 + 498478360900 = 4441117^2 + 706030^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221998568589 - 2²⁰ = 20221997520013 is a prime.

It is a super-2 number, since 2×20221998568589² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221998568529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110999284294 + 10110999284295.

It is an arithmetic number, because the mean of its divisors is an integer number (10110999284295).

Almost surely, 2^{20221998568589} is an apocalyptic number.

It is an amenable number.

20221998568589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221998568589 is an equidigital number, since it uses as much as digits as its factorization.

20221998568589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 447897600, while the sum is 74.

The spelling of 20221998568589 in words is "twenty trillion, two hundred twenty-one billion, nine hundred ninety-eight million, five hundred sixty-eight thousand, five hundred eighty-nine".