18382109 has 4 divisors (see below), whose sum is σ = 18469440. Its totient is φ = 18294780.

The previous prime is 18382097. The next prime is 18382121. The reversal of 18382109 is 90128381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (18382097) and next prime (18382121).

It is a cyclic number.

It is not a de Polignac number, because 18382109 - 2¹² = 18378013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18382159) 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, 43349 + ... + 43770.

It is an arithmetic number, because the mean of its divisors is an integer number (4617360).

Almost surely, 2^18382109 is an apocalyptic number.

It is an amenable number.

18382109 is a deficient number, since it is larger than the sum of its proper divisors (87331).

18382109 is an equidigital number, since it uses as much as digits as its factorization.

18382109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87330.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18382109 is about 4287.4361802830. The cubic root of 18382109 is about 263.9156305622.

The spelling of 18382109 in words is "eighteen million, three hundred eighty-two thousand, one hundred nine".