12181315952 has 20 divisors (see below), whose sum is σ = 25416784680. Its totient is φ = 5622145728.

The previous prime is 12181315919. The next prime is 12181315981. The reversal of 12181315952 is 25951318121.

It is a congruent number.

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, 29281802 + ... + 29282217.

It is an arithmetic number, because the mean of its divisors is an integer number (1270839234).

Almost surely, 2^12181315952 is an apocalyptic number.

It is an amenable number.

12181315952 is an abundant number, since it is smaller than the sum of its proper divisors (13235468728).

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

12181315952 is a wasteful number, since it uses less digits than its factorization.

12181315952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58564040 (or 58564034 counting only the distinct ones).

The product of its digits is 21600, while the sum is 38.

The spelling of 12181315952 in words is "twelve billion, one hundred eighty-one million, three hundred fifteen thousand, nine hundred fifty-two".