18279189 has 12 divisors (see below), whose sum is σ = 27381536. Its totient is φ = 12185964.

The previous prime is 18279187. The next prime is 18279211. The reversal of 18279189 is 98197281.

It is not a de Polignac number, because 18279189 - 2¹ = 18279187 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 (18279187) 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 11 ways as a sum of consecutive naturals, for example, 37369 + ... + 37854.

Almost surely, 2^18279189 is an apocalyptic number.

It is an amenable number.

18279189 is a deficient number, since it is larger than the sum of its proper divisors (9102347).

18279189 is an frugal number, since it uses more digits than its factorization.

18279189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75238 (or 75226 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 18279189 is about 4275.4168217847. The cubic root of 18279189 is about 263.4221607436.

The spelling of 18279189 in words is "eighteen million, two hundred seventy-nine thousand, one hundred eighty-nine".