12181622718 has 16 divisors (see below), whose sum is σ = 24385548816. Its totient is φ = 4056823680.

The previous prime is 12181622707. The next prime is 12181622729. The reversal of 12181622718 is 81722618121.

It is an interprime number because it is at equal distance from previous prime (12181622707) and next prime (12181622729).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 922203 + ... + 935318.

It is an arithmetic number, because the mean of its divisors is an integer number (1524096801).

Almost surely, 2^12181622718 is an apocalyptic number.

12181622718 is an abundant number, since it is smaller than the sum of its proper divisors (12203926098).

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

12181622718 is a wasteful number, since it uses less digits than its factorization.

12181622718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858619.

The product of its digits is 21504, while the sum is 39.

The spelling of 12181622718 in words is "twelve billion, one hundred eighty-one million, six hundred twenty-two thousand, seven hundred eighteen".