22661823889 has 2 divisors, whose sum is σ = 22661823890. Its totient is φ = 22661823888.

The previous prime is 22661823881. The next prime is 22661823931. The reversal of 22661823889 is 98832816622.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15677043264 + 6984780625 = 125208^2 + 83575^2 .

It is a cyclic number.

It is not a de Polignac number, because 22661823889 - 2³ = 22661823881 is a prime.

It is not a weakly prime, because it can be changed into another prime (22661823881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11330911944 + 11330911945.

It is an arithmetic number, because the mean of its divisors is an integer number (11330911945).

Almost surely, 2^22661823889 is an apocalyptic number.

It is an amenable number.

22661823889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22661823889 is an equidigital number, since it uses as much as digits as its factorization.

22661823889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 55.

The spelling of 22661823889 in words is "twenty-two billion, six hundred sixty-one million, eight hundred twenty-three thousand, eight hundred eighty-nine".