20031133312 has 64 divisors (see below), whose sum is σ = 40339857600. Its totient is φ = 9907200000.

The previous prime is 20031133301. The next prime is 20031133387. The reversal of 20031133312 is 21333113002.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 20031133312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4849264 + ... + 4853392.

It is an arithmetic number, because the mean of its divisors is an integer number (630310275).

Almost surely, 2^20031133312 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 20031133312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20169928800).

20031133312 is an abundant number, since it is smaller than the sum of its proper divisors (20308724288).

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

20031133312 is a wasteful number, since it uses less digits than its factorization.

20031133312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545 (or 4533 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20031133312 its reverse (21333113002), we get a palindrome (41364246314).

The spelling of 20031133312 in words is "twenty billion, thirty-one million, one hundred thirty-three thousand, three hundred twelve".