18189122 has 8 divisors (see below), whose sum is σ = 31181376. Its totient is φ = 7795332.

The previous prime is 18189109. The next prime is 18189131. The reversal of 18189122 is 22198181.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649598 + ... + 649625.

It is an arithmetic number, because the mean of its divisors is an integer number (3897672).

Almost surely, 2^18189122 is an apocalyptic number.

18189122 is a deficient number, since it is larger than the sum of its proper divisors (12992254).

18189122 is a wasteful number, since it uses less digits than its factorization.

18189122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299232.

The product of its digits is 2304, while the sum is 32.

The square root of 18189122 is about 4264.8706897162. The cubic root of 18189122 is about 262.9887950813.

The spelling of 18189122 in words is "eighteen million, one hundred eighty-nine thousand, one hundred twenty-two".