20131323324312 has 128 divisors (see below), whose sum is σ = 53949844454400. Its totient is φ = 6243585689088.

The previous prime is 20131323324269. The next prime is 20131323324323. The reversal of 20131323324312 is 21342332313102.

It is a self number, because there is not a number n which added to its sum of digits gives 20131323324312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79874989 + ... + 80126627.

It is an arithmetic number, because the mean of its divisors is an integer number (421483159800).

Almost surely, 2^{20131323324312} 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 20131323324312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26974922227200).

20131323324312 is an abundant number, since it is smaller than the sum of its proper divisors (33818521130088).

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

20131323324312 is a wasteful number, since it uses less digits than its factorization.

20131323324312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255625 (or 255621 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 20131323324312 its reverse (21342332313102), we get a palindrome (41473655637414).

The spelling of 20131323324312 in words is "twenty trillion, one hundred thirty-one billion, three hundred twenty-three million, three hundred twenty-four thousand, three hundred twelve".