20816167 has 2 divisors, whose sum is σ = 20816168. Its totient is φ = 20816166.

The previous prime is 20816161. The next prime is 20816179. The reversal of 20816167 is 76161802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20816167 - 2¹¹ = 20814119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20816161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10408083 + 10408084.

It is an arithmetic number, because the mean of its divisors is an integer number (10408084).

Almost surely, 2^20816167 is an apocalyptic number.

20816167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20816167 is an equidigital number, since it uses as much as digits as its factorization.

20816167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20816167 is about 4562.4737807466. The cubic root of 20816167 is about 275.0850073288.

Adding to 20816167 its reverse (76161802), we get a palindrome (96977969).

The spelling of 20816167 in words is "twenty million, eight hundred sixteen thousand, one hundred sixty-seven".