320420143320 has 128 divisors (see below), whose sum is σ = 984047961600. Its totient is φ = 83421563904.

The previous prime is 320420143319. The next prime is 320420143339. The reversal of 320420143320 is 23341024023.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12903076 + ... + 12927884.

It is an arithmetic number, because the mean of its divisors is an integer number (7687874700).

Almost surely, 2^320420143320 is an apocalyptic number.

320420143320 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 320420143320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492023980800).

320420143320 is an abundant number, since it is smaller than the sum of its proper divisors (663627818280).

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

320420143320 is a wasteful number, since it uses less digits than its factorization.

320420143320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27369 (or 27365 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 320420143320 its reverse (23341024023), we get a palindrome (343761167343).

The spelling of 320420143320 in words is "three hundred twenty billion, four hundred twenty million, one hundred forty-three thousand, three hundred twenty".