12318578032 has 20 divisors (see below), whose sum is σ = 23869800360. Its totient is φ = 6158629568.

The previous prime is 12318578003. The next prime is 12318578033. The reversal of 12318578032 is 23087581321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12318578033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135978 + ... + 207670.

It is an arithmetic number, because the mean of its divisors is an integer number (1193490018).

Almost surely, 2^12318578032 is an apocalyptic number.

It is an amenable number.

12318578032 is a deficient number, since it is larger than the sum of its proper divisors (11551222328).

12318578032 is a wasteful number, since it uses less digits than its factorization.

12318578032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82440 (or 82434 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 12318578032 in words is "twelve billion, three hundred eighteen million, five hundred seventy-eight thousand, thirty-two".