18608189 has 4 divisors (see below), whose sum is σ = 18800124. Its totient is φ = 18416256.

The previous prime is 18608179. The next prime is 18608197. The reversal of 18608189 is 98180681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98180681 = 2803 ⋅35027.

It can be written as a sum of positive squares in 2 ways, for example, as 13468900 + 5139289 = 3670^2 + 2267^2 .

It is a cyclic number.

It is not a de Polignac number, because 18608189 - 2⁸ = 18607933 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 (18608119) 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, 95822 + ... + 96015.

It is an arithmetic number, because the mean of its divisors is an integer number (4700031).

Almost surely, 2^18608189 is an apocalyptic number.

It is an amenable number.

18608189 is a deficient number, since it is larger than the sum of its proper divisors (191935).

18608189 is an equidigital number, since it uses as much as digits as its factorization.

18608189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191934.

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 18608189 is about 4313.7210155503. The cubic root of 18608189 is about 264.9931836386.

The spelling of 18608189 in words is "eighteen million, six hundred eight thousand, one hundred eighty-nine".