18122199 has 4 divisors (see below), whose sum is σ = 24162936. Its totient is φ = 12081464.

The previous prime is 18122191. The next prime is 18122201. The reversal of 18122199 is 99122181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18122199 - 2³ = 18122191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18122191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020364 + ... + 3020369.

It is an arithmetic number, because the mean of its divisors is an integer number (6040734).

Almost surely, 2^18122199 is an apocalyptic number.

18122199 is a deficient number, since it is larger than the sum of its proper divisors (6040737).

18122199 is an equidigital number, since it uses as much as digits as its factorization.

18122199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6040736.

The product of its digits is 2592, while the sum is 33.

The square root of 18122199 is about 4257.0176180044. The cubic root of 18122199 is about 262.6658616175.

The spelling of 18122199 in words is "eighteen million, one hundred twenty-two thousand, one hundred ninety-nine".