320313421220 has 96 divisors (see below), whose sum is σ = 731207917440. Its totient is φ = 117161441280.

The previous prime is 320313421213. The next prime is 320313421237. The reversal of 320313421220 is 22124313023.

It is a super-2 number, since 2×320313421220² (a number of 24 digits) contains 22 as substring.

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, 20189651 + ... + 20205509.

It is an arithmetic number, because the mean of its divisors is an integer number (7616749140).

Almost surely, 2^320313421220 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 320313421220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365603958720).

320313421220 is an abundant number, since it is smaller than the sum of its proper divisors (410894496220).

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

320313421220 is a wasteful number, since it uses less digits than its factorization.

320313421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16605 (or 16603 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 320313421220 its reverse (22124313023), we get a palindrome (342437734243).

The spelling of 320313421220 in words is "three hundred twenty billion, three hundred thirteen million, four hundred twenty-one thousand, two hundred twenty".