320131343420 has 24 divisors (see below), whose sum is σ = 768315224544. Its totient is φ = 109759317696.

The previous prime is 320131343419. The next prime is 320131343423. The reversal of 320131343420 is 24343131023.

It is a self number, because there is not a number n which added to its sum of digits gives 320131343420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131343423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143326087 + ... + 1143326366.

It is an arithmetic number, because the mean of its divisors is an integer number (32013134356).

Almost surely, 2^320131343420 is an apocalyptic number.

It is an amenable number.

320131343420 is an abundant number, since it is smaller than the sum of its proper divisors (448183881124).

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

320131343420 is a wasteful number, since it uses less digits than its factorization.

320131343420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286652469 (or 2286652467 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 320131343420 its reverse (24343131023), we get a palindrome (344474474443).

The spelling of 320131343420 in words is "three hundred twenty billion, one hundred thirty-one million, three hundred forty-three thousand, four hundred twenty".