20308106163 has 4 divisors (see below), whose sum is σ = 27077474888. Its totient is φ = 13538737440.

The previous prime is 20308106111. The next prime is 20308106173. The reversal of 20308106163 is 36160180302.

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

It is not a de Polignac number, because 20308106163 - 2⁸ = 20308105907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20308106163.

It is not an unprimeable number, because it can be changed into a prime (20308106173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3384684358 + ... + 3384684363.

It is an arithmetic number, because the mean of its divisors is an integer number (6769368722).

Almost surely, 2^20308106163 is an apocalyptic number.

20308106163 is a deficient number, since it is larger than the sum of its proper divisors (6769368725).

20308106163 is an equidigital number, since it uses as much as digits as its factorization.

20308106163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6769368724.

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 20308106163 its reverse (36160180302), we get a palindrome (56468286465).

The spelling of 20308106163 in words is "twenty billion, three hundred eight million, one hundred six thousand, one hundred sixty-three".