12181940004 has 24 divisors (see below), whose sum is σ = 30611029120. Its totient is φ = 3748289184.

The previous prime is 12181939993. The next prime is 12181940009. The reversal of 12181940004 is 40004918121.

It is a super-2 number, since 2×12181940004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12181940009) 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, 39044524 + ... + 39044835.

Almost surely, 2^12181940004 is an apocalyptic number.

It is an amenable number.

12181940004 is an abundant number, since it is smaller than the sum of its proper divisors (18429089116).

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

12181940004 is a wasteful number, since it uses less digits than its factorization.

12181940004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78089379 (or 78089377 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 12181940004 in words is "twelve billion, one hundred eighty-one million, nine hundred forty thousand, four".