320320020 has 24 divisors (see below), whose sum is σ = 896896224. Its totient is φ = 85418656.

The previous prime is 320319973. The next prime is 320320037. The reversal of 320320020 is 20023023.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 320319978 and 320320005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669274 + ... + 2669393.

It is an arithmetic number, because the mean of its divisors is an integer number (37370676).

Almost surely, 2^320320020 is an apocalyptic number.

320320020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320320020 is an abundant number, since it is smaller than the sum of its proper divisors (576576204).

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

320320020 is a wasteful number, since it uses less digits than its factorization.

320320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338679 (or 5338677 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 320320020 is about 17897.4864156954. The cubic root of 320320020 is about 684.2183137471.

Adding to 320320020 its reverse (20023023), we get a palindrome (340343043).

The spelling of 320320020 in words is "three hundred twenty million, three hundred twenty thousand, twenty".