12133555180 has 72 divisors (see below), whose sum is σ = 27317228400. Its totient is φ = 4525784064.

The previous prime is 12133555177. The next prime is 12133555183. The reversal of 12133555180 is 8155533121.

It is an interprime number because it is at equal distance from previous prime (12133555177) and next prime (12133555183).

It is a super-2 number, since 2×12133555180² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (12133555183) 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, 620391 + ... + 639649.

It is an arithmetic number, because the mean of its divisors is an integer number (379405950).

Almost surely, 2^12133555180 is an apocalyptic number.

12133555180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12133555180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13658614200).

12133555180 is an abundant number, since it is smaller than the sum of its proper divisors (15183673220).

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

12133555180 is a wasteful number, since it uses less digits than its factorization.

12133555180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19411 (or 19392 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 12133555180 in words is "twelve billion, one hundred thirty-three million, five hundred fifty-five thousand, one hundred eighty".