20895163 has 2 divisors, whose sum is σ = 20895164. Its totient is φ = 20895162.

The previous prime is 20895143. The next prime is 20895179. The reversal of 20895163 is 36159802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20895163 - 2¹⁷ = 20764091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20895143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10447581 + 10447582.

It is an arithmetic number, because the mean of its divisors is an integer number (10447582).

Almost surely, 2^20895163 is an apocalyptic number.

20895163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20895163 is an equidigital number, since it uses as much as digits as its factorization.

20895163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20895163 is about 4571.1227286084. The cubic root of 20895163 is about 275.4325446427.

The spelling of 20895163 in words is "twenty million, eight hundred ninety-five thousand, one hundred sixty-three".