23887871993 has 4 divisors (see below), whose sum is σ = 23942286720. Its totient is φ = 23833457268.

The previous prime is 23887871983. The next prime is 23887872017. The reversal of 23887871993 is 39917878832.

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 a cyclic number.

It is not a de Polignac number, because 23887871993 - 2²⁶ = 23820763129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23887871983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27206705 + ... + 27207582.

It is an arithmetic number, because the mean of its divisors is an integer number (5985571680).

Almost surely, 2^23887871993 is an apocalyptic number.

It is an amenable number.

23887871993 is a deficient number, since it is larger than the sum of its proper divisors (54414727).

23887871993 is an equidigital number, since it uses as much as digits as its factorization.

23887871993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54414726.

The product of its digits is 36578304, while the sum is 65.

The spelling of 23887871993 in words is "twenty-three billion, eight hundred eighty-seven million, eight hundred seventy-one thousand, nine hundred ninety-three".