20500203 has 4 divisors (see below), whose sum is σ = 27333608. Its totient is φ = 13666800.

The previous prime is 20500189. The next prime is 20500217. The reversal of 20500203 is 30200502.

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

It is an interprime number because it is at equal distance from previous prime (20500189) and next prime (20500217).

It is not a de Polignac number, because 20500203 - 2¹⁰ = 20499179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20500223) 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, 3416698 + ... + 3416703.

It is an arithmetic number, because the mean of its divisors is an integer number (6833402).

Almost surely, 2^20500203 is an apocalyptic number.

20500203 is a deficient number, since it is larger than the sum of its proper divisors (6833405).

20500203 is an equidigital number, since it uses as much as digits as its factorization.

20500203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833404.

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 20500203 is about 4527.7149866130. The cubic root of 20500203 is about 273.6860871206.

Adding to 20500203 its reverse (30200502), we get a palindrome (50700705).

The spelling of 20500203 in words is "twenty million, five hundred thousand, two hundred three".