181923380712 has 96 divisors (see below), whose sum is σ = 538520935680. Its totient is φ = 55232893440.

The previous prime is 181923380711. The next prime is 181923380767. The reversal of 181923380712 is 217083329181.

181923380712 is a `hidden beast` number, since 18 + 192 + 3 + 380 + 71 + 2 = 666.

It is a super-2 number, since 2×181923380712² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (181923380711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2359318 + ... + 2435205.

It is an arithmetic number, because the mean of its divisors is an integer number (5609593080).

Almost surely, 2^181923380712 is an apocalyptic number.

181923380712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181923380712 is an abundant number, since it is smaller than the sum of its proper divisors (356597554968).

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

181923380712 is a wasteful number, since it uses less digits than its factorization.

181923380712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4794583 (or 4794576 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 181923380712 in words is "one hundred eighty-one billion, nine hundred twenty-three million, three hundred eighty thousand, seven hundred twelve".