12318708736 has 66 divisors (see below), whose sum is σ = 25743739322. Its totient is φ = 5891297280.

The previous prime is 12318708683. The next prime is 12318708739. The reversal of 12318708736 is 63780781321.

It can be written as a sum of positive squares in only one way, i.e., 7930971136 + 4387737600 = 89056^2 + 66240^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12318708739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 530326 + ... + 553066.

Almost surely, 2^12318708736 is an apocalyptic number.

12318708736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12318708736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12871869661).

12318708736 is an abundant number, since it is smaller than the sum of its proper divisors (13425030586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12318708736 is an equidigital number, since it uses as much as digits as its factorization.

12318708736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22807 (or 22766 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 12318708736 in words is "twelve billion, three hundred eighteen million, seven hundred eight thousand, seven hundred thirty-six".