18265238427 has 8 divisors (see below), whose sum is σ = 24528857920. Its totient is φ = 12089222280.

The previous prime is 18265238399. The next prime is 18265238491. The reversal of 18265238427 is 72483256281.

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

It is not a de Polignac number, because 18265238427 - 2²⁰ = 18264189851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18265238627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21900349 + ... + 21901182.

It is an arithmetic number, because the mean of its divisors is an integer number (3066107240).

Almost surely, 2^18265238427 is an apocalyptic number.

18265238427 is a deficient number, since it is larger than the sum of its proper divisors (6263619493).

18265238427 is a wasteful number, since it uses less digits than its factorization.

18265238427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43801673.

The product of its digits is 1290240, while the sum is 48.

The spelling of 18265238427 in words is "eighteen billion, two hundred sixty-five million, two hundred thirty-eight thousand, four hundred twenty-seven".