18340189 has 16 divisors (see below), whose sum is σ = 21790720. Its totient is φ = 15104880.

The previous prime is 18340169. The next prime is 18340207. The reversal of 18340189 is 98104381.

It is a happy number.

It is not a de Polignac number, because 18340189 - 2⁷ = 18340061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48202 + ... + 48580.

It is an arithmetic number, because the mean of its divisors is an integer number (1361920).

Almost surely, 2^18340189 is an apocalyptic number.

It is an amenable number.

18340189 is a deficient number, since it is larger than the sum of its proper divisors (3450531).

18340189 is a wasteful number, since it uses less digits than its factorization.

18340189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18340189 is about 4282.5446874493. The cubic root of 18340189 is about 263.7148599141.

The spelling of 18340189 in words is "eighteen million, three hundred forty thousand, one hundred eighty-nine".