20420431203 has 32 divisors (see below), whose sum is σ = 28910560000. Its totient is φ = 12784770432.

The previous prime is 20420431193. The next prime is 20420431211. The reversal of 20420431203 is 30213402402.

It is not a de Polignac number, because 20420431203 - 2²⁴ = 20403653987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20420431203.

It is not an unprimeable number, because it can be changed into a prime (20420431103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6566613 + ... + 6569721.

It is an arithmetic number, because the mean of its divisors is an integer number (903455000).

Almost surely, 2^20420431203 is an apocalyptic number.

20420431203 is a deficient number, since it is larger than the sum of its proper divisors (8490128797).

20420431203 is a wasteful number, since it uses less digits than its factorization.

20420431203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20420431203 its reverse (30213402402), we get a palindrome (50633833605).

The spelling of 20420431203 in words is "twenty billion, four hundred twenty million, four hundred thirty-one thousand, two hundred three".