320123020 has 96 divisors (see below), whose sum is σ = 815109120. Its totient is φ = 103161600.

The previous prime is 320123017. The next prime is 320123047. The reversal of 320123020 is 20321023.

It is a happy number.

320123020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401262 + ... + 402058.

It is an arithmetic number, because the mean of its divisors is an integer number (8490720).

Almost surely, 2^320123020 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 320123020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407554560).

320123020 is an abundant number, since it is smaller than the sum of its proper divisors (494986100).

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

320123020 is a wasteful number, since it uses less digits than its factorization.

320123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983 (or 981 counting only the distinct ones).

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

The square root of 320123020 is about 17891.9820031208. The cubic root of 320123020 is about 684.0780179581.

Adding to 320123020 its reverse (20321023), we get a palindrome (340444043).

The spelling of 320123020 in words is "three hundred twenty million, one hundred twenty-three thousand, twenty".