18108980 has 12 divisors (see below), whose sum is σ = 38028900. Its totient is φ = 7243584.

The previous prime is 18108973. The next prime is 18108983. The reversal of 18108980 is 8980181.

It can be written as a sum of positive squares in 2 ways, for example, as 10201636 + 7907344 = 3194^2 + 2812^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18108980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18108983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452705 + ... + 452744.

It is an arithmetic number, because the mean of its divisors is an integer number (3169075).

Almost surely, 2^18108980 is an apocalyptic number.

18108980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18108980 is an abundant number, since it is smaller than the sum of its proper divisors (19919920).

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

18108980 is a wasteful number, since it uses less digits than its factorization.

18108980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905458 (or 905456 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 18108980 is about 4255.4647219781. The cubic root of 18108980 is about 262.6019800284.

The spelling of 18108980 in words is "eighteen million, one hundred eight thousand, nine hundred eighty".