23917395657 has 4 divisors (see below), whose sum is σ = 31889860880. Its totient is φ = 15944930436.

The previous prime is 23917395631. The next prime is 23917395703. The reversal of 23917395657 is 75659371932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23917395657 - 2¹¹ = 23917393609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23917395597 and 23917395606.

It is not an unprimeable number, because it can be changed into a prime (23917391657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3986232607 + ... + 3986232612.

It is an arithmetic number, because the mean of its divisors is an integer number (7972465220).

Almost surely, 2^23917395657 is an apocalyptic number.

It is an amenable number.

23917395657 is a deficient number, since it is larger than the sum of its proper divisors (7972465223).

23917395657 is an equidigital number, since it uses as much as digits as its factorization.

23917395657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7972465222.

The product of its digits is 10716300, while the sum is 57.

The spelling of 23917395657 in words is "twenty-three billion, nine hundred seventeen million, three hundred ninety-five thousand, six hundred fifty-seven".