181432329012 has 72 divisors (see below), whose sum is σ = 526645697760. Its totient is φ = 52085833920.

The previous prime is 181432328971. The next prime is 181432329017. The reversal of 181432329012 is 210923234181.

181432329012 is a `hidden beast` number, since 181 + 432 + 32 + 9 + 0 + 12 = 666.

181432329012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×181432329012² (a number of 23 digits) contains 22 as substring.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181432329017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12049383 + ... + 12064430.

It is an arithmetic number, because the mean of its divisors is an integer number (7314523580).

Almost surely, 2^181432329012 is an apocalyptic number.

181432329012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181432329012 is an abundant number, since it is smaller than the sum of its proper divisors (345213368748).

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

181432329012 is a wasteful number, since it uses less digits than its factorization.

181432329012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24113853 (or 24113848 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 181432329012 in words is "one hundred eighty-one billion, four hundred thirty-two million, three hundred twenty-nine thousand, twelve".