18099109 has 8 divisors (see below), whose sum is σ = 20968640. Its totient is φ = 15300576.

The previous prime is 18099061. The next prime is 18099131. The reversal of 18099109 is 90199081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18099109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18099199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17199 + ... + 18220.

It is an arithmetic number, because the mean of its divisors is an integer number (2621080).

Almost surely, 2^18099109 is an apocalyptic number.

It is an amenable number.

18099109 is a deficient number, since it is larger than the sum of its proper divisors (2869531).

18099109 is an equidigital number, since it uses as much as digits as its factorization.

18099109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35499.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 18099109 is about 4254.3047610626. The cubic root of 18099109 is about 262.5542575675.

It can be divided in two parts, 18099 and 109, that multiplied together give a palindrome (1972791).

The spelling of 18099109 in words is "eighteen million, ninety-nine thousand, one hundred nine".