31996319960 has 128 divisors (see below), whose sum is σ = 82875398400. Its totient is φ = 10995264000.

The previous prime is 31996319959. The next prime is 31996319963. The reversal of 31996319960 is 6991369913.

It is a junction number, because it is equal to n+sod(n) for n = 31996319896 and 31996319905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31996319963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3515015 + ... + 3524105.

It is an arithmetic number, because the mean of its divisors is an integer number (647464050).

Almost surely, 2^31996319960 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 31996319960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41437699200).

31996319960 is an abundant number, since it is smaller than the sum of its proper divisors (50879078440).

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

31996319960 is a wasteful number, since it uses less digits than its factorization.

31996319960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553 (or 9549 counting only the distinct ones).

The product of its (nonzero) digits is 2125764, while the sum is 56.

The spelling of 31996319960 in words is "thirty-one billion, nine hundred ninety-six million, three hundred nineteen thousand, nine hundred sixty".