320350020 has 96 divisors (see below), whose sum is σ = 922078080. Its totient is φ = 83066880.

The previous prime is 320349983. The next prime is 320350021. The reversal of 320350020 is 20053023.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (320350021) by changing a digit.

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, 416196 + ... + 416964.

It is an arithmetic number, because the mean of its divisors is an integer number (9604980).

Almost surely, 2^320350020 is an apocalyptic number.

320350020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320350020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461039040).

320350020 is an abundant number, since it is smaller than the sum of its proper divisors (601728060).

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

320350020 is a wasteful number, since it uses less digits than its factorization.

320350020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 320350020 is about 17898.3245025896. The cubic root of 320350020 is about 684.2396735408.

The spelling of 320350020 in words is "three hundred twenty million, three hundred fifty thousand, twenty".