20321323113 has 64 divisors (see below), whose sum is σ = 34565189120. Its totient is φ = 10332997632.

The previous prime is 20321323111. The next prime is 20321323117. The reversal of 20321323113 is 31132312302.

It is not a de Polignac number, because 20321323113 - 2¹ = 20321323111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20321323113.

It is not an unprimeable number, because it can be changed into a prime (20321323111) 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 63 ways as a sum of consecutive naturals, for example, 1091781 + ... + 1110237.

It is an arithmetic number, because the mean of its divisors is an integer number (540081080).

Almost surely, 2^20321323113 is an apocalyptic number.

It is an amenable number.

20321323113 is a deficient number, since it is larger than the sum of its proper divisors (14243866007).

20321323113 is a wasteful number, since it uses less digits than its factorization.

20321323113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18626.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20321323113 its reverse (31132312302), we get a palindrome (51453635415).

The spelling of 20321323113 in words is "twenty billion, three hundred twenty-one million, three hundred twenty-three thousand, one hundred thirteen".