20312011312 has 20 divisors (see below), whose sum is σ = 39999679936. Its totient is φ = 9989513280.

The previous prime is 20312011309. The next prime is 20312011327. The reversal of 20312011312 is 21311021302.

It is a super-2 number, since 2×20312011312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10404768 + ... + 10406719.

Almost surely, 2^20312011312 is an apocalyptic number.

It is an amenable number.

20312011312 is a deficient number, since it is larger than the sum of its proper divisors (19687668624).

20312011312 is a wasteful number, since it uses less digits than its factorization.

20312011312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20811556 (or 20811550 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20312011312 its reverse (21311021302), we get a palindrome (41623032614).

The spelling of 20312011312 in words is "twenty billion, three hundred twelve million, eleven thousand, three hundred twelve".