20108199 has 4 divisors (see below), whose sum is σ = 26810936. Its totient is φ = 13405464.

The previous prime is 20108177. The next prime is 20108201. The reversal of 20108199 is 99180102.

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

It is not a de Polignac number, because 20108199 - 2⁵ = 20108167 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 (20108129) 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, 3351364 + ... + 3351369.

It is an arithmetic number, because the mean of its divisors is an integer number (6702734).

Almost surely, 2^20108199 is an apocalyptic number.

20108199 is a deficient number, since it is larger than the sum of its proper divisors (6702737).

20108199 is an equidigital number, since it uses as much as digits as its factorization.

20108199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6702736.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 20108199 is about 4484.2166539988. The cubic root of 20108199 is about 271.9303770405.

The spelling of 20108199 in words is "twenty million, one hundred eight thousand, one hundred ninety-nine".