320421320340 has 96 divisors (see below), whose sum is σ = 985310524800. Its totient is φ = 77156544000.

The previous prime is 320421320309. The next prime is 320421320341. The reversal of 320421320340 is 43023124023.

It is a self number, because there is not a number n which added to its sum of digits gives 320421320340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320421320341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1530811 + ... + 1727490.

It is an arithmetic number, because the mean of its divisors is an integer number (10263651300).

Almost surely, 2^320421320340 is an apocalyptic number.

320421320340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320421320340 is an abundant number, since it is smaller than the sum of its proper divisors (664889204460).

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

320421320340 is a wasteful number, since it uses less digits than its factorization.

320421320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258473 (or 3258471 counting only the distinct ones).

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

Adding to 320421320340 its reverse (43023124023), we get a palindrome (363444444363).

The spelling of 320421320340 in words is "three hundred twenty billion, four hundred twenty-one million, three hundred twenty thousand, three hundred forty".