20711167 has 2 divisors, whose sum is σ = 20711168. Its totient is φ = 20711166.

The previous prime is 20711143. The next prime is 20711177. The reversal of 20711167 is 76111702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20711167 - 2¹⁹ = 20186879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20711177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10355583 + 10355584.

It is an arithmetic number, because the mean of its divisors is an integer number (10355584).

Almost surely, 2^20711167 is an apocalyptic number.

20711167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20711167 is an equidigital number, since it uses as much as digits as its factorization.

20711167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 20711167 is about 4550.9523179220. The cubic root of 20711167 is about 274.6217035366.

Adding to 20711167 its reverse (76111702), we get a palindrome (96822869).

The spelling of 20711167 in words is "twenty million, seven hundred eleven thousand, one hundred sixty-seven".