23998657213 has 2 divisors, whose sum is σ = 23998657214. Its totient is φ = 23998657212.

The previous prime is 23998657211. The next prime is 23998657229. The reversal of 23998657213 is 31275689932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18203946084 + 5794711129 = 134922^2 + 76123^2 .

It is a cyclic number.

It is not a de Polignac number, because 23998657213 - 2¹ = 23998657211 is a prime.

Together with 23998657211, 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 (23998657211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11999328606 + 11999328607.

It is an arithmetic number, because the mean of its divisors is an integer number (11999328607).

Almost surely, 2^23998657213 is an apocalyptic number.

It is an amenable number.

23998657213 is a deficient number, since it is larger than the sum of its proper divisors (1).

23998657213 is an equidigital number, since it uses as much as digits as its factorization.

23998657213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 55.

The spelling of 23998657213 in words is "twenty-three billion, nine hundred ninety-eight million, six hundred fifty-seven thousand, two hundred thirteen".