23857645313 has 2 divisors, whose sum is σ = 23857645314. Its totient is φ = 23857645312.

The previous prime is 23857645309. The next prime is 23857645337. The reversal of 23857645313 is 31354675832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18350224369 + 5507420944 = 135463^2 + 74212^2 .

It is a cyclic number.

It is not a de Polignac number, because 23857645313 - 2² = 23857645309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23857645373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11928822656 + 11928822657.

It is an arithmetic number, because the mean of its divisors is an integer number (11928822657).

Almost surely, 2^23857645313 is an apocalyptic number.

It is an amenable number.

23857645313 is a deficient number, since it is larger than the sum of its proper divisors (1).

23857645313 is an equidigital number, since it uses as much as digits as its factorization.

23857645313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 47.

The spelling of 23857645313 in words is "twenty-three billion, eight hundred fifty-seven million, six hundred forty-five thousand, three hundred thirteen".