20313131312 has 80 divisors (see below), whose sum is σ = 40392602208. Its totient is φ = 9893990400.

The previous prime is 20313131303. The next prime is 20313131317. The reversal of 20313131312 is 21313131302.

It is not an unprimeable number, because it can be changed into a prime (20313131317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31590863 + ... + 31591505.

Almost surely, 2^20313131312 is an apocalyptic number.

It is an amenable number.

20313131312 is a deficient number, since it is larger than the sum of its proper divisors (20079470896).

20313131312 is a wasteful number, since it uses less digits than its factorization.

20313131312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20313131312 its reverse (21313131302), we get a palindrome (41626262614).

The spelling of 20313131312 in words is "twenty billion, three hundred thirteen million, one hundred thirty-one thousand, three hundred twelve".