20320031223 has 10 divisors (see below), whose sum is σ = 30354614664. Its totient is φ = 13546687428.

The previous prime is 20320031203. The next prime is 20320031239. The reversal of 20320031223 is 32213002302.

It is a happy number.

It is not a de Polignac number, because 20320031223 - 2⁶ = 20320031159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20320031196 and 20320031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320031203) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125432211 + ... + 125432372.

Almost surely, 2^20320031223 is an apocalyptic number.

20320031223 is a deficient number, since it is larger than the sum of its proper divisors (10034583441).

20320031223 is an equidigital number, since it uses as much as digits as its factorization.

20320031223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250864595 (or 250864586 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20320031223 its reverse (32213002302), we get a palindrome (52533033525).

The spelling of 20320031223 in words is "twenty billion, three hundred twenty million, thirty-one thousand, two hundred twenty-three".