20321331201320 has 16 divisors (see below), whose sum is σ = 45722995203060. Its totient is φ = 8128532480512.

The previous prime is 20321331201299. The next prime is 20321331201361. The reversal of 20321331201320 is 2310213312302.

It can be written as a sum of positive squares in 2 ways, for example, as 17843206670884 + 2478124530436 = 4224122^2 + 1574206^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254016639977 + ... + 254016640056.

Almost surely, 2^{20321331201320} is an apocalyptic number.

20321331201320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321331201320 is an abundant number, since it is smaller than the sum of its proper divisors (25401664001740).

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

20321331201320 is a wasteful number, since it uses less digits than its factorization.

20321331201320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508033280044 (or 508033280040 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20321331201320 its reverse (2310213312302), we get a palindrome (22631544513622).

The spelling of 20321331201320 in words is "twenty trillion, three hundred twenty-one billion, three hundred thirty-one million, two hundred one thousand, three hundred twenty".