18017130 has 64 divisors (see below), whose sum is σ = 46247040. Its totient is φ = 4478976.

The previous prime is 18017123. The next prime is 18017141. The reversal of 18017130 is 3171081.

It is a junction number, because it is equal to n+sod(n) for n = 18017097 and 18017106.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 41394 + ... + 41826.

It is an arithmetic number, because the mean of its divisors is an integer number (722610).

Almost surely, 2^18017130 is an apocalyptic number.

18017130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18017130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23123520).

18017130 is an abundant number, since it is smaller than the sum of its proper divisors (28229910).

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

18017130 is a wasteful number, since it uses less digits than its factorization.

18017130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 18017130 is about 4244.6589969042. The cubic root of 18017130 is about 262.1572488032.

The spelling of 18017130 in words is "eighteen million, seventeen thousand, one hundred thirty".