20031320312 has 16 divisors (see below), whose sum is σ = 38087722800. Its totient is φ = 9874594240.

The previous prime is 20031320291. The next prime is 20031320317. The reversal of 20031320312 is 21302313002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031320317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17632637 + ... + 17633772.

It is an arithmetic number, because the mean of its divisors is an integer number (2380482675).

Almost surely, 2^20031320312 is an apocalyptic number.

It is an amenable number.

20031320312 is a deficient number, since it is larger than the sum of its proper divisors (18056402488).

20031320312 is a wasteful number, since it uses less digits than its factorization.

20031320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35266486 (or 35266482 counting only the distinct ones).

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

Adding to 20031320312 its reverse (21302313002), we get a palindrome (41333633314).

The spelling of 20031320312 in words is "twenty billion, thirty-one million, three hundred twenty thousand, three hundred twelve".