18108199 has 6 divisors (see below), whose sum is σ = 18930296. Its totient is φ = 17320380.

The previous prime is 18108173. The next prime is 18108217. The reversal of 18108199 is 99180181.

It is a happy number.

It is not a de Polignac number, because 18108199 - 2¹³ = 18100007 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 (18108109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16587 + ... + 17644.

Almost surely, 2^18108199 is an apocalyptic number.

18108199 is a deficient number, since it is larger than the sum of its proper divisors (822097).

18108199 is an equidigital number, since it uses as much as digits as its factorization.

18108199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34277 (or 34254 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 18108199 is about 4255.3729566279. The cubic root of 18108199 is about 262.5982048278.

The spelling of 18108199 in words is "eighteen million, one hundred eight thousand, one hundred ninety-nine".