320403320200020 has 48 divisors (see below), whose sum is σ = 908485363618560. Its totient is φ = 84359355190656.

The previous prime is 320403320199973. The next prime is 320403320200081. The reversal of 320403320200020 is 20002023304023.

It is a self number, because there is not a number n which added to its sum of digits gives 320403320200020.

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, 33797813847 + ... + 33797823326.

It is an arithmetic number, because the mean of its divisors is an integer number (18926778408720).

Almost surely, 2^{320403320200020} is an apocalyptic number.

320403320200020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320403320200020 is an abundant number, since it is smaller than the sum of its proper divisors (588082043418540).

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

320403320200020 is a wasteful number, since it uses less digits than its factorization.

320403320200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67595637264 (or 67595637262 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 320403320200020 its reverse (20002023304023), we get a palindrome (340405343504043).

The spelling of 320403320200020 in words is "three hundred twenty trillion, four hundred three billion, three hundred twenty million, two hundred thousand, twenty".