331310320020 has 144 divisors (see below), whose sum is σ = 1010955254400. Its totient is φ = 87824487168.

The previous prime is 331310320013. The next prime is 331310320021. The reversal of 331310320020 is 20023013133.

331310320020 is a `hidden beast` number, since 3 + 31 + 310 + 320 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 331310319975 and 331310320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331310320021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45738519 + ... + 45745761.

It is an arithmetic number, because the mean of its divisors is an integer number (7020522600).

Almost surely, 2^331310320020 is an apocalyptic number.

331310320020 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 331310320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505477627200).

331310320020 is an abundant number, since it is smaller than the sum of its proper divisors (679644934380).

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

331310320020 is a wasteful number, since it uses less digits than its factorization.

331310320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8734 (or 8729 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 331310320020 its reverse (20023013133), we get a palindrome (351333333153).

The spelling of 331310320020 in words is "three hundred thirty-one billion, three hundred ten million, three hundred twenty thousand, twenty".