20313311312 has 80 divisors (see below), whose sum is σ = 47378336640. Its totient is φ = 8242020864.

The previous prime is 20313311309. The next prime is 20313311323. The reversal of 20313311312 is 21311331302.

It is a super-2 number, since 2×20313311312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5183978 + ... + 5187894.

It is an arithmetic number, because the mean of its divisors is an integer number (592229208).

Almost surely, 2^20313311312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20313311312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23689168320).

20313311312 is an abundant number, since it is smaller than the sum of its proper divisors (27065025328).

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

20313311312 is a wasteful number, since it uses less digits than its factorization.

20313311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6388 (or 6382 counting only the distinct ones).

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

Adding to 20313311312 its reverse (21311331302), we get a palindrome (41624642614).

The spelling of 20313311312 in words is "twenty billion, three hundred thirteen million, three hundred eleven thousand, three hundred twelve".