20450203 has 4 divisors (see below), whose sum is σ = 20540520. Its totient is φ = 20359888.

The previous prime is 20450149. The next prime is 20450207. The reversal of 20450203 is 30205402.

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

It is a cyclic number.

It is not a de Polignac number, because 20450203 - 2¹³ = 20442011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20450207) 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, 44818 + ... + 45271.

It is an arithmetic number, because the mean of its divisors is an integer number (5135130).

Almost surely, 2^20450203 is an apocalyptic number.

20450203 is a deficient number, since it is larger than the sum of its proper divisors (90317).

20450203 is an equidigital number, since it uses as much as digits as its factorization.

20450203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90316.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20450203 is about 4522.1900667707. The cubic root of 20450203 is about 273.4633991664.

Adding to 20450203 its reverse (30205402), we get a palindrome (50655605).

The spelling of 20450203 in words is "twenty million, four hundred fifty thousand, two hundred three".