18799189 has 8 divisors (see below), whose sum is σ = 19840640. Its totient is φ = 17762976.

The previous prime is 18799177. The next prime is 18799199. The reversal of 18799189 is 98199781.

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

It is a cyclic number.

It is not a de Polignac number, because 18799189 - 2²³ = 10410581 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 (18799199) 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, 7729 + ... + 9865.

It is an arithmetic number, because the mean of its divisors is an integer number (2480080).

Almost surely, 2^18799189 is an apocalyptic number.

18799189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18799189 is a deficient number, since it is larger than the sum of its proper divisors (1041451).

18799189 is a wasteful number, since it uses less digits than its factorization.

18799189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619.

The product of its digits is 326592, while the sum is 52.

The square root of 18799189 is about 4335.8031551259. The cubic root of 18799189 is about 265.8967554925.

The spelling of 18799189 in words is "eighteen million, seven hundred ninety-nine thousand, one hundred eighty-nine".