320345203420 has 72 divisors (see below), whose sum is σ = 739573574544. Its totient is φ = 116468352000.

The previous prime is 320345203357. The next prime is 320345203531. The reversal of 320345203420 is 24302543023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21992940 + ... + 22007500.

It is an arithmetic number, because the mean of its divisors is an integer number (10271855202).

Almost surely, 2^320345203420 is an apocalyptic number.

It is an amenable number.

320345203420 is an abundant number, since it is smaller than the sum of its proper divisors (419228371124).

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

320345203420 is a wasteful number, since it uses less digits than its factorization.

320345203420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23683 (or 23670 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 28.

Adding to 320345203420 its reverse (24302543023), we get a palindrome (344647746443).

The spelling of 320345203420 in words is "three hundred twenty billion, three hundred forty-five million, two hundred three thousand, four hundred twenty".