20313031312 has 40 divisors (see below), whose sum is σ = 45254839616. Its totient is φ = 8652168576.

The previous prime is 20313031301. The next prime is 20313031337. The reversal of 20313031312 is 21313031302.

It is a self number, because there is not a number n which added to its sum of digits gives 20313031312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538083 + ... + 574594.

Almost surely, 2^20313031312 is an apocalyptic number.

It is an amenable number.

20313031312 is an abundant number, since it is smaller than the sum of its proper divisors (24941808304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20313031312 is a wasteful number, since it uses less digits than its factorization.

20313031312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112855 (or 1112849 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20313031312 its reverse (21313031302), we get a palindrome (41626062614).

The spelling of 20313031312 in words is "twenty billion, three hundred thirteen million, thirty-one thousand, three hundred twelve".