320213020 has 48 divisors (see below), whose sum is σ = 714909888. Its totient is φ = 120058880.

The previous prime is 320213017. The next prime is 320213039. The reversal of 320213020 is 20312023.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87630 + ... + 91210.

It is an arithmetic number, because the mean of its divisors is an integer number (14893956).

Almost surely, 2^320213020 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 320213020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357454944).

320213020 is an abundant number, since it is smaller than the sum of its proper divisors (394696868).

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

320213020 is a wasteful number, since it uses less digits than its factorization.

320213020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870 (or 3868 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320213020 is about 17894.4969194443. The cubic root of 320213020 is about 684.1421196200.

Adding to 320213020 its reverse (20312023), we get a palindrome (340525043).

The spelling of 320213020 in words is "three hundred twenty million, two hundred thirteen thousand, twenty".