20310131313 has 12 divisors (see below), whose sum is σ = 29488863300. Its totient is φ = 13469930496.

The previous prime is 20310131299. The next prime is 20310131329. The reversal of 20310131313 is 31313101302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3899752704 + 16410378609 = 62448^2 + 128103^2 .

It is not a de Polignac number, because 20310131313 - 2⁹ = 20310130801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20310136313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5844588 + ... + 5848061.

It is an arithmetic number, because the mean of its divisors is an integer number (2457405275).

Almost surely, 2^20310131313 is an apocalyptic number.

It is an amenable number.

20310131313 is a deficient number, since it is larger than the sum of its proper divisors (9178731987).

20310131313 is a wasteful number, since it uses less digits than its factorization.

20310131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11692848 (or 11692845 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 20310131313 its reverse (31313101302), we get a palindrome (51623232615).

The spelling of 20310131313 in words is "twenty billion, three hundred ten million, one hundred thirty-one thousand, three hundred thirteen".