320420521303 has 12 divisors (see below), whose sum is σ = 340578370600. Its totient is φ = 301394293632.

The previous prime is 320420521283. The next prime is 320420521313. The reversal of 320420521303 is 303125024023.

It is not a de Polignac number, because 320420521303 - 2¹⁷ = 320420390231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320420521313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164725 + ... + 817297.

Almost surely, 2^320420521303 is an apocalyptic number.

320420521303 is a deficient number, since it is larger than the sum of its proper divisors (20157849297).

320420521303 is a wasteful number, since it uses less digits than its factorization.

320420521303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654306 (or 654289 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 320420521303 its reverse (303125024023), we get a palindrome (623545545326).

The spelling of 320420521303 in words is "three hundred twenty billion, four hundred twenty million, five hundred twenty-one thousand, three hundred three".