20203203 has 4 divisors (see below), whose sum is σ = 26937608. Its totient is φ = 13468800.

The previous prime is 20203187. The next prime is 20203217. The reversal of 20203203 is 30230202.

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

It is not a de Polignac number, because 20203203 - 2⁴ = 20203187 is a prime.

It is a super-2 number, since 2×20203203² = 816338822918418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367198 + ... + 3367203.

It is an arithmetic number, because the mean of its divisors is an integer number (6734402).

Almost surely, 2^20203203 is an apocalyptic number.

20203203 is a deficient number, since it is larger than the sum of its proper divisors (6734405).

20203203 is an equidigital number, since it uses as much as digits as its factorization.

20203203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734404.

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20203203 is about 4494.7973257979. The cubic root of 20203203 is about 272.3579620570.

Adding to 20203203 its reverse (30230202), we get a palindrome (50433405).

The spelling of 20203203 in words is "twenty million, two hundred three thousand, two hundred three".