18239658423 has 12 divisors (see below), whose sum is σ = 28290082680. Its totient is φ = 10422661872.

The previous prime is 18239658413. The next prime is 18239658497. The reversal of 18239658423 is 32485693281.

It is a happy number.

It is not a de Polignac number, because 18239658423 - 2²¹ = 18237561271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18239658403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62039508 + ... + 62039801.

It is an arithmetic number, because the mean of its divisors is an integer number (2357506890).

Almost surely, 2^18239658423 is an apocalyptic number.

18239658423 is a deficient number, since it is larger than the sum of its proper divisors (10050424257).

18239658423 is a wasteful number, since it uses less digits than its factorization.

18239658423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124079326 (or 124079319 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The spelling of 18239658423 in words is "eighteen billion, two hundred thirty-nine million, six hundred fifty-eight thousand, four hundred twenty-three".