320021313020 has 12 divisors (see below), whose sum is σ = 672044757384. Its totient is φ = 128008525200.

The previous prime is 320021312987. The next prime is 320021313067. The reversal of 320021313020 is 20313120023.

It is a self number, because there is not a number n which added to its sum of digits gives 320021313020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8000532806 + ... + 8000532845.

It is an arithmetic number, because the mean of its divisors is an integer number (56003729782).

Almost surely, 2^320021313020 is an apocalyptic number.

It is an amenable number.

320021313020 is an abundant number, since it is smaller than the sum of its proper divisors (352023444364).

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

320021313020 is a wasteful number, since it uses less digits than its factorization.

320021313020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16001065660 (or 16001065658 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 320021313020 its reverse (20313120023), we get a palindrome (340334433043).

The spelling of 320021313020 in words is "three hundred twenty billion, twenty-one million, three hundred thirteen thousand, twenty".