320013020 has 24 divisors (see below), whose sum is σ = 681236304. Its totient is φ = 126251136.

The previous prime is 320013019. The next prime is 320013061. The reversal of 320013020 is 20310023.

It is a junction number, because it is equal to n+sod(n) for n = 320012992 and 320013010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108134 + ... + 111053.

It is an arithmetic number, because the mean of its divisors is an integer number (28384846).

Almost surely, 2^320013020 is an apocalyptic number.

It is an amenable number.

320013020 is an abundant number, since it is smaller than the sum of its proper divisors (361223284).

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

320013020 is a wasteful number, since it uses less digits than its factorization.

320013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219269 (or 219267 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 320013020 is about 17888.9077363600. The cubic root of 320013020 is about 683.9996551644. Note that the first 3 decimals are identical.

Adding to 320013020 its reverse (20310023), we get a palindrome (340323043).

The spelling of 320013020 in words is "three hundred twenty million, thirteen thousand, twenty".