20031212313 has 12 divisors (see below), whose sum is σ = 33067398208. Its totient is φ = 11446407000.

The previous prime is 20031212303. The next prime is 20031212323. The reversal of 20031212313 is 31321213002.

It is an interprime number because it is at equal distance from previous prime (20031212303) and next prime (20031212323).

It is not a de Polignac number, because 20031212313 - 2⁹ = 20031211801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031212303) 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, 158977813 + ... + 158977938.

Almost surely, 2^20031212313 is an apocalyptic number.

It is an amenable number.

20031212313 is a deficient number, since it is larger than the sum of its proper divisors (13036185895).

20031212313 is a wasteful number, since it uses less digits than its factorization.

20031212313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317955764 (or 317955761 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20031212313 its reverse (31321213002), we get a palindrome (51352425315).

The spelling of 20031212313 in words is "twenty billion, thirty-one million, two hundred twelve thousand, three hundred thirteen".