12181836740 has 24 divisors (see below), whose sum is σ = 25710417600. Its totient is φ = 4848247008.

The previous prime is 12181836739. The next prime is 12181836749. The reversal of 12181836740 is 4763818121.

It is not an unprimeable number, because it can be changed into a prime (12181836749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526402 + ... + 1534361.

It is an arithmetic number, because the mean of its divisors is an integer number (1071267400).

Almost surely, 2^12181836740 is an apocalyptic number.

12181836740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12181836740 is an abundant number, since it is smaller than the sum of its proper divisors (13528580860).

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

12181836740 is a wasteful number, since it uses less digits than its factorization.

12181836740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060971 (or 3060969 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 12181836740 in words is "twelve billion, one hundred eighty-one million, eight hundred thirty-six thousand, seven hundred forty".