20320013231 has 8 divisors (see below), whose sum is σ = 23603575584. Its totient is φ = 17131626720.

The previous prime is 20320013227. The next prime is 20320013237. The reversal of 20320013231 is 13231002302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20320013231 - 2² = 20320013227 is a prime.

It is a super-2 number, since 2×20320013231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320013237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23793500 + ... + 23794353.

It is an arithmetic number, because the mean of its divisors is an integer number (2950446948).

Almost surely, 2^20320013231 is an apocalyptic number.

20320013231 is a deficient number, since it is larger than the sum of its proper divisors (3283562353).

20320013231 is an equidigital number, since it uses as much as digits as its factorization.

20320013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47587921.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20320013231 its reverse (13231002302), we get a palindrome (33551015533).

The spelling of 20320013231 in words is "twenty billion, three hundred twenty million, thirteen thousand, two hundred thirty-one".