22659605989 has 2 divisors, whose sum is σ = 22659605990. Its totient is φ = 22659605988.

The previous prime is 22659605987. The next prime is 22659605999. The reversal of 22659605989 is 98950695622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18406348900 + 4253257089 = 135670^2 + 65217^2 .

It is a cyclic number.

It is not a de Polignac number, because 22659605989 - 2¹ = 22659605987 is a prime.

Together with 22659605987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22659605987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11329802994 + 11329802995.

It is an arithmetic number, because the mean of its divisors is an integer number (11329802995).

Almost surely, 2^22659605989 is an apocalyptic number.

It is an amenable number.

22659605989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22659605989 is an equidigital number, since it uses as much as digits as its factorization.

22659605989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20995200, while the sum is 61.

The spelling of 22659605989 in words is "twenty-two billion, six hundred fifty-nine million, six hundred five thousand, nine hundred eighty-nine".