18118199 has 8 divisors (see below), whose sum is σ = 19813248. Its totient is φ = 16431160.

The previous prime is 18118193. The next prime is 18118211. The reversal of 18118199 is 99181181.

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 18118199 - 2⁴ = 18118183 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 (18118193) 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 7 ways as a sum of consecutive naturals, for example, 3374 + ... + 6900.

It is an arithmetic number, because the mean of its divisors is an integer number (2476656).

Almost surely, 2^18118199 is an apocalyptic number.

18118199 is a deficient number, since it is larger than the sum of its proper divisors (1695049).

18118199 is a wasteful number, since it uses less digits than its factorization.

18118199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005.

The product of its digits is 5184, while the sum is 38.

The square root of 18118199 is about 4256.5477795979. The cubic root of 18118199 is about 262.6465346628.

The spelling of 18118199 in words is "eighteen million, one hundred eighteen thousand, one hundred ninety-nine".