320444320020 has 384 divisors, whose sum is σ = 1037848412160. Its totient is φ = 73114821120.

The previous prime is 320444319931. The next prime is 320444320039. The reversal of 320444320020 is 20023444023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 527914557 + ... + 527915163.

It is an arithmetic number, because the mean of its divisors is an integer number (2702730240).

Almost surely, 2^320444320020 is an apocalyptic number.

320444320020 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 320444320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518924206080).

320444320020 is an abundant number, since it is smaller than the sum of its proper divisors (717404092140).

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

320444320020 is a wasteful number, since it uses less digits than its factorization.

320444320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 320444320020 its reverse (20023444023), we get a palindrome (340467764043).

The spelling of 320444320020 in words is "three hundred twenty billion, four hundred forty-four million, three hundred twenty thousand, twenty".