18845189 has 8 divisors (see below), whose sum is σ = 20759232. Its totient is φ = 16964640.

The previous prime is 18845171. The next prime is 18845191. The reversal of 18845189 is 98154881.

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

It is not a de Polignac number, because 18845189 - 2⁸ = 18844933 is a prime.

It is a super-2 number, since 2×18845189² = 710282296891442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18845159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7184 + ... + 9449.

It is an arithmetic number, because the mean of its divisors is an integer number (2594904).

Almost surely, 2^18845189 is an apocalyptic number.

It is an amenable number.

18845189 is a deficient number, since it is larger than the sum of its proper divisors (1914043).

18845189 is a wasteful number, since it uses less digits than its factorization.

18845189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16747.

The product of its digits is 92160, while the sum is 44.

The square root of 18845189 is about 4341.1045829374. The cubic root of 18845189 is about 266.1134543444.

The spelling of 18845189 in words is "eighteen million, eight hundred forty-five thousand, one hundred eighty-nine".