12138332794 has 8 divisors (see below), whose sum is σ = 20808570528. Its totient is φ = 5202142620.

The previous prime is 12138332779. The next prime is 12138332807. The reversal of 12138332794 is 49723383121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12138332794.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433511872 + ... + 433511899.

It is an arithmetic number, because the mean of its divisors is an integer number (2601071316).

Almost surely, 2^12138332794 is an apocalyptic number.

12138332794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12138332794 is a deficient number, since it is larger than the sum of its proper divisors (8670237734).

12138332794 is an equidigital number, since it uses as much as digits as its factorization.

12138332794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867023780.

The product of its digits is 217728, while the sum is 43.

The spelling of 12138332794 in words is "twelve billion, one hundred thirty-eight million, three hundred thirty-two thousand, seven hundred ninety-four".