31032131132020 has 96 divisors (see below), whose sum is σ = 69544023696000. Its totient is φ = 11597288638464.

The previous prime is 31032131132017. The next prime is 31032131132029. The reversal of 31032131132020 is 2023113123013.

It is a junction number, because it is equal to n+sod(n) for n = 31032131131982 and 31032131132000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032131132029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305838256 + ... + 305939704.

It is an arithmetic number, because the mean of its divisors is an integer number (724416913500).

Almost surely, 2^{31032131132020} 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 31032131132020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34772011848000).

31032131132020 is an abundant number, since it is smaller than the sum of its proper divisors (38511892563980).

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

31032131132020 is a wasteful number, since it uses less digits than its factorization.

31032131132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112577 (or 112575 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31032131132020 its reverse (2023113123013), we get a palindrome (33055244255033).

The spelling of 31032131132020 in words is "thirty-one trillion, thirty-two billion, one hundred thirty-one million, one hundred thirty-two thousand, twenty".