23921611957 has 8 divisors (see below), whose sum is σ = 24420874680. Its totient is φ = 23424123840.

The previous prime is 23921611939. The next prime is 23921611963. The reversal of 23921611957 is 75911612932.

It can be written as a sum of positive squares in 4 ways, for example, as 6878048356 + 17043563601 = 82934^2 + 130551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23921611957 - 2²⁷ = 23787394229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23921611907) 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 7 ways as a sum of consecutive naturals, for example, 416394 + ... + 470347.

It is an arithmetic number, because the mean of its divisors is an integer number (3052609335).

Almost surely, 2^23921611957 is an apocalyptic number.

It is an amenable number.

23921611957 is a deficient number, since it is larger than the sum of its proper divisors (499262723).

23921611957 is an equidigital number, since it uses as much as digits as its factorization.

23921611957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887303.

The product of its digits is 204120, while the sum is 46.

The spelling of 23921611957 in words is "twenty-three billion, nine hundred twenty-one million, six hundred eleven thousand, nine hundred fifty-seven".