20420231303 has 4 divisors (see below), whose sum is σ = 21124377240. Its totient is φ = 19716085368.

The previous prime is 20420231269. The next prime is 20420231311. The reversal of 20420231303 is 30313202402.

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 20420231303 - 2²⁴ = 20403454087 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 (20420231333) 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, 352072925 + ... + 352072982.

It is an arithmetic number, because the mean of its divisors is an integer number (5281094310).

Almost surely, 2^20420231303 is an apocalyptic number.

20420231303 is a deficient number, since it is larger than the sum of its proper divisors (704145937).

20420231303 is an equidigital number, since it uses as much as digits as its factorization.

20420231303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704145936.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20420231303 its reverse (30313202402), we get a palindrome (50733433705).

The spelling of 20420231303 in words is "twenty billion, four hundred twenty million, two hundred thirty-one thousand, three hundred three".