18996199 has 2 divisors, whose sum is σ = 18996200. Its totient is φ = 18996198.

The previous prime is 18996169. The next prime is 18996209. The reversal of 18996199 is 99169981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18996199 - 2⁵ = 18996167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18996169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9498099 + 9498100.

It is an arithmetic number, because the mean of its divisors is an integer number (9498100).

Almost surely, 2^18996199 is an apocalyptic number.

18996199 is a deficient number, since it is larger than the sum of its proper divisors (1).

18996199 is an equidigital number, since it uses as much as digits as its factorization.

18996199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 52.

The square root of 18996199 is about 4358.4629171303. The cubic root of 18996199 is about 266.8223696598.

The spelling of 18996199 in words is "eighteen million, nine hundred ninety-six thousand, one hundred ninety-nine".