20312640312244 has 96 divisors (see below), whose sum is σ = 42121483407360. Its totient is φ = 8386185830400.

The previous prime is 20312640312089. The next prime is 20312640312287. The reversal of 20312640312244 is 44221304621302.

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, 671676964 + ... + 671707204.

It is an arithmetic number, because the mean of its divisors is an integer number (438765452160).

Almost surely, 2^{20312640312244} 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 20312640312244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21060741703680).

20312640312244 is an abundant number, since it is smaller than the sum of its proper divisors (21808843095116).

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

20312640312244 is a wasteful number, since it uses less digits than its factorization.

20312640312244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32129 (or 32127 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 20312640312244 its reverse (44221304621302), we get a palindrome (64533944933546).

The spelling of 20312640312244 in words is "twenty trillion, three hundred twelve billion, six hundred forty million, three hundred twelve thousand, two hundred forty-four".