320221302020 has 96 divisors (see below), whose sum is σ = 700770825216. Its totient is φ = 122779238400.

The previous prime is 320221302007. The next prime is 320221302031. The reversal of 320221302020 is 20203122023.

It is a self number, because there is not a number n which added to its sum of digits gives 320221302020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46860524 + ... + 46867356.

It is an arithmetic number, because the mean of its divisors is an integer number (7299696096).

Almost surely, 2^320221302020 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 320221302020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350385412608).

320221302020 is an abundant number, since it is smaller than the sum of its proper divisors (380549523196).

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

320221302020 is a wasteful number, since it uses less digits than its factorization.

320221302020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7581 (or 7579 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 320221302020 its reverse (20203122023), we get a palindrome (340424424043).

The spelling of 320221302020 in words is "three hundred twenty billion, two hundred twenty-one million, three hundred two thousand, twenty".