12117844396 has 72 divisors (see below), whose sum is σ = 26270504736. Its totient is φ = 4786905600.

The previous prime is 12117844391. The next prime is 12117844397. The reversal of 12117844396 is 69344871121.

It is not an unprimeable number, because it can be changed into a prime (12117844391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357796 + ... + 390196.

Almost surely, 2^12117844396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12117844396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13135252368).

12117844396 is an abundant number, since it is smaller than the sum of its proper divisors (14152660340).

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

12117844396 is a wasteful number, since it uses less digits than its factorization.

12117844396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32487 (or 32466 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The spelling of 12117844396 in words is "twelve billion, one hundred seventeen million, eight hundred forty-four thousand, three hundred ninety-six".