31323320332020 has 240 divisors, whose sum is σ = 99196084088640. Its totient is φ = 8273881645056.

The previous prime is 31323320331997. The next prime is 31323320332079. The reversal of 31323320332020 is 2023302332313.

31323320332020 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 3 + 320 + 332 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 74314707 + ... + 74735013.

It is an arithmetic number, because the mean of its divisors is an integer number (413317017036).

Almost surely, 2^{31323320332020} is an apocalyptic number.

31323320332020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31323320332020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49598042044320).

31323320332020 is an abundant number, since it is smaller than the sum of its proper divisors (67872763756620).

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

31323320332020 is a wasteful number, since it uses less digits than its factorization.

31323320332020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420764 (or 420753 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 27.

Adding to 31323320332020 its reverse (2023302332313), we get a palindrome (33346622664333).

The spelling of 31323320332020 in words is "thirty-one trillion, three hundred twenty-three billion, three hundred twenty million, three hundred thirty-two thousand, twenty".