12180380832 has 144 divisors (see below), whose sum is σ = 36024337440. Its totient is φ = 4048434432.

The previous prime is 12180380827. The next prime is 12180380873. The reversal of 12180380832 is 23808308121.

12180380832 is a `hidden beast` number, since 121 + 80 + 380 + 83 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2945038 + ... + 2949170.

It is an arithmetic number, because the mean of its divisors is an integer number (250169010).

Almost surely, 2^12180380832 is an apocalyptic number.

12180380832 is a gapful number since it is divisible by the number (12) 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 12180380832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18012168720).

12180380832 is an abundant number, since it is smaller than the sum of its proper divisors (23843956608).

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

12180380832 is an equidigital number, since it uses as much as digits as its factorization.

12180380832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537 (or 4517 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

Adding to 12180380832 its reverse (23808308121), we get a palindrome (35988688953).

The spelling of 12180380832 in words is "twelve billion, one hundred eighty million, three hundred eighty thousand, eight hundred thirty-two".