320324545021 has 24 divisors (see below), whose sum is σ = 355532685480. Its totient is φ = 288299980800.

The previous prime is 320324545019. The next prime is 320324545033. The reversal of 320324545021 is 120545423023.

It can be written as a sum of positive squares in 12 ways, for example, as 200341284025 + 119983260996 = 447595^2 + 346386^2 .

It is not a de Polignac number, because 320324545021 - 2¹ = 320324545019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320324545421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12383061 + ... + 12408901.

It is an arithmetic number, because the mean of its divisors is an integer number (14813861895).

Almost surely, 2^320324545021 is an apocalyptic number.

It is an amenable number.

320324545021 is a deficient number, since it is larger than the sum of its proper divisors (35208140459).

320324545021 is a wasteful number, since it uses less digits than its factorization.

320324545021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27697 (or 27684 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 320324545021 its reverse (120545423023), we get a palindrome (440869968044).

The spelling of 320324545021 in words is "three hundred twenty billion, three hundred twenty-four million, five hundred forty-five thousand, twenty-one".