20331311312 has 80 divisors (see below), whose sum is σ = 44225502720. Its totient is φ = 8990784000.

The previous prime is 20331311267. The next prime is 20331311339. The reversal of 20331311312 is 21311313302.

It is a super-3 number, since 3×20331311312³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635639 + ... + 666857.

It is an arithmetic number, because the mean of its divisors is an integer number (552818784).

Almost surely, 2^20331311312 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 20331311312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22112751360).

20331311312 is an abundant number, since it is smaller than the sum of its proper divisors (23894191408).

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

20331311312 is a wasteful number, since it uses less digits than its factorization.

20331311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31372 (or 31366 counting only the distinct ones).

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

Adding to 20331311312 its reverse (21311313302), we get a palindrome (41642624614).

The spelling of 20331311312 in words is "twenty billion, three hundred thirty-one million, three hundred eleven thousand, three hundred twelve".