20313320323221 has 6 divisors (see below), whose sum is σ = 29341462689110. Its totient is φ = 13542213548808.

The previous prime is 20313320323133. The next prime is 20313320323271. The reversal of 20313320323221 is 12232302331302.

20313320323221 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 332 + 0 + 3 + 2 + 322 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17628359520996 + 2684960802225 = 4198614^2 + 1638585^2 .

It is not a de Polignac number, because 20313320323221 - 2⁹ = 20313320322709 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 (20313320323271) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1128517795726 + ... + 1128517795743.

Almost surely, 2^{20313320323221} is an apocalyptic number.

It is an amenable number.

20313320323221 is a deficient number, since it is larger than the sum of its proper divisors (9028142365889).

20313320323221 is a wasteful number, since it uses less digits than its factorization.

20313320323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257035591475 (or 2257035591472 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 20313320323221 its reverse (12232302331302), we get a palindrome (32545622654523).

The spelling of 20313320323221 in words is "twenty trillion, three hundred thirteen billion, three hundred twenty million, three hundred twenty-three thousand, two hundred twenty-one".