20243199 has 4 divisors (see below), whose sum is σ = 26990936. Its totient is φ = 13495464.

The previous prime is 20243177. The next prime is 20243203. The reversal of 20243199 is 99134202.

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

It is not a de Polignac number, because 20243199 - 2⁷ = 20243071 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 (20243149) 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, 3373864 + ... + 3373869.

It is an arithmetic number, because the mean of its divisors is an integer number (6747734).

Almost surely, 2^20243199 is an apocalyptic number.

20243199 is a deficient number, since it is larger than the sum of its proper divisors (6747737).

20243199 is an equidigital number, since it uses as much as digits as its factorization.

20243199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6747736.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20243199 is about 4499.2442698747. The cubic root of 20243199 is about 272.5375713423.

The spelling of 20243199 in words is "twenty million, two hundred forty-three thousand, one hundred ninety-nine".