12318184538 has 24 divisors (see below), whose sum is σ = 21378675360. Its totient is φ = 5304479400.

The previous prime is 12318184537. The next prime is 12318184553. The reversal of 12318184538 is 83548181321.

12318184538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12318184537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1334918 + ... + 1344113.

It is an arithmetic number, because the mean of its divisors is an integer number (890778140).

Almost surely, 2^12318184538 is an apocalyptic number.

12318184538 is a deficient number, since it is larger than the sum of its proper divisors (9060490822).

12318184538 is a wasteful number, since it uses less digits than its factorization.

12318184538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679074 (or 2679063 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The spelling of 12318184538 in words is "twelve billion, three hundred eighteen million, one hundred eighty-four thousand, five hundred thirty-eight".