20320332163 has 4 divisors (see below), whose sum is σ = 20326331520. Its totient is φ = 20314332808.

The previous prime is 20320332143. The next prime is 20320332181. The reversal of 20320332163 is 36123302302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20320332163 - 2²¹ = 20318235011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20320332143) 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 3 ways as a sum of consecutive naturals, for example, 2994595 + ... + 3001372.

It is an arithmetic number, because the mean of its divisors is an integer number (5081582880).

Almost surely, 2^20320332163 is an apocalyptic number.

20320332163 is a deficient number, since it is larger than the sum of its proper divisors (5999357).

20320332163 is an equidigital number, since it uses as much as digits as its factorization.

20320332163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999356.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 20320332163 its reverse (36123302302), we get a palindrome (56443634465).

The spelling of 20320332163 in words is "twenty billion, three hundred twenty million, three hundred thirty-two thousand, one hundred sixty-three".