23598920981 has 2 divisors, whose sum is σ = 23598920982. Its totient is φ = 23598920980.

The previous prime is 23598920893. The next prime is 23598921019. The reversal of 23598920981 is 18902989532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20161444081 + 3437476900 = 141991^2 + 58630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23598920981 is a prime.

It is a super-2 number, since 2×23598920981² (a number of 22 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 (23598920581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11799460490 + 11799460491.

It is an arithmetic number, because the mean of its divisors is an integer number (11799460491).

Almost surely, 2^23598920981 is an apocalyptic number.

It is an amenable number.

23598920981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23598920981 is an equidigital number, since it uses as much as digits as its factorization.

23598920981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 23598920981 in words is "twenty-three billion, five hundred ninety-eight million, nine hundred twenty thousand, nine hundred eighty-one".