20321320113 has 24 divisors (see below), whose sum is σ = 29434904928. Its totient is φ = 13509811392.

The previous prime is 20321320099. The next prime is 20321320127. The reversal of 20321320113 is 31102312302.

20321320113 is a `hidden beast` number, since 20 + 321 + 320 + 1 + 1 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (20321320099) and next prime (20321320127).

It is not a de Polignac number, because 20321320113 - 2¹⁷ = 20321189041 is a prime.

It is a super-2 number, since 2×20321320113² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20321320183) 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, 6589870 + ... + 6592952.

It is an arithmetic number, because the mean of its divisors is an integer number (1226454372).

Almost surely, 2^20321320113 is an apocalyptic number.

It is an amenable number.

20321320113 is a deficient number, since it is larger than the sum of its proper divisors (9113584815).

20321320113 is a wasteful number, since it uses less digits than its factorization.

20321320113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893 (or 4890 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20321320113 its reverse (31102312302), we get a palindrome (51423632415).

The spelling of 20321320113 in words is "twenty billion, three hundred twenty-one million, three hundred twenty thousand, one hundred thirteen".