31320321332020 has 96 divisors (see below), whose sum is σ = 79598509304832. Its totient is φ = 10105703866368.

The previous prime is 31320321332009. The next prime is 31320321332081. The reversal of 31320321332020 is 2023312302313.

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, 23061292 + ... + 24381628.

It is an arithmetic number, because the mean of its divisors is an integer number (829151138592).

Almost surely, 2^{31320321332020} is an apocalyptic number.

It is an amenable number.

31320321332020 is an abundant number, since it is smaller than the sum of its proper divisors (48278187972812).

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

31320321332020 is a wasteful number, since it uses less digits than its factorization.

31320321332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330337 (or 1330335 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31320321332020 its reverse (2023312302313), we get a palindrome (33343633634333).

The spelling of 31320321332020 in words is "thirty-one trillion, three hundred twenty billion, three hundred twenty-one million, three hundred thirty-two thousand, twenty".