181814980 has 12 divisors (see below), whose sum is σ = 381811500. Its totient is φ = 72725984.

The previous prime is 181814959. The next prime is 181814981. The reversal of 181814980 is 89418181.

It can be written as a sum of positive squares in 2 ways, for example, as 81974916 + 99840064 = 9054^2 + 9992^2 .

It is not an unprimeable number, because it can be changed into a prime (181814981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545355 + ... + 4545394.

It is an arithmetic number, because the mean of its divisors is an integer number (31817625).

Almost surely, 2^181814980 is an apocalyptic number.

181814980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181814980 is an abundant number, since it is smaller than the sum of its proper divisors (199996520).

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

181814980 is a wasteful number, since it uses less digits than its factorization.

181814980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9090758 (or 9090756 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 40.

The square root of 181814980 is about 13483.8785221464. The cubic root of 181814980 is about 566.5130094723.

The spelling of 181814980 in words is "one hundred eighty-one million, eight hundred fourteen thousand, nine hundred eighty".