20585199 has 4 divisors (see below), whose sum is σ = 27446936. Its totient is φ = 13723464.

The previous prime is 20585177. The next prime is 20585203. The reversal of 20585199 is 99158502.

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

It is not a de Polignac number, because 20585199 - 2⁵ = 20585167 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 (20585119) 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, 3430864 + ... + 3430869.

It is an arithmetic number, because the mean of its divisors is an integer number (6861734).

Almost surely, 2^20585199 is an apocalyptic number.

20585199 is a deficient number, since it is larger than the sum of its proper divisors (6861737).

20585199 is an equidigital number, since it uses as much as digits as its factorization.

20585199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861736.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 20585199 is about 4537.0914692124. The cubic root of 20585199 is about 274.0638093526.

The spelling of 20585199 in words is "twenty million, five hundred eighty-five thousand, one hundred ninety-nine".