18243564875 has 64 divisors (see below), whose sum is σ = 25666243200. Its totient is φ = 12864614400.

The previous prime is 18243564853. The next prime is 18243564887. The reversal of 18243564875 is 57846534281.

It is not a de Polignac number, because 18243564875 - 2⁶ = 18243564811 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3590837 + ... + 3595913.

It is an arithmetic number, because the mean of its divisors is an integer number (401035050).

Almost surely, 2^18243564875 is an apocalyptic number.

18243564875 is a deficient number, since it is larger than the sum of its proper divisors (7422678325).

18243564875 is a wasteful number, since it uses less digits than its factorization.

18243564875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217 (or 5207 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 53.

The spelling of 18243564875 in words is "eighteen billion, two hundred forty-three million, five hundred sixty-four thousand, eight hundred seventy-five".