23864391387 has 24 divisors (see below), whose sum is σ = 36544460160. Its totient is φ = 14980256640.

The previous prime is 23864391379. The next prime is 23864391389. The reversal of 23864391387 is 78319346832.

It is not a de Polignac number, because 23864391387 - 2³ = 23864391379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23864391389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1145562 + ... + 1166207.

It is an arithmetic number, because the mean of its divisors is an integer number (1522685840).

Almost surely, 2^23864391387 is an apocalyptic number.

23864391387 is a deficient number, since it is larger than the sum of its proper divisors (12680068773).

23864391387 is a wasteful number, since it uses less digits than its factorization.

23864391387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311843 (or 2311840 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 23864391387 in words is "twenty-three billion, eight hundred sixty-four million, three hundred ninety-one thousand, three hundred eighty-seven".