20145163 has 2 divisors, whose sum is σ = 20145164. Its totient is φ = 20145162.

The previous prime is 20145127. The next prime is 20145173. The reversal of 20145163 is 36154102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20145163 - 2¹³ = 20136971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20145173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072581 + 10072582.

It is an arithmetic number, because the mean of its divisors is an integer number (10072582).

Almost surely, 2^20145163 is an apocalyptic number.

20145163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145163 is an equidigital number, since it uses as much as digits as its factorization.

20145163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20145163 is about 4488.3363287526. The cubic root of 20145163 is about 272.0969008481.

Adding to 20145163 its reverse (36154102), we get a palindrome (56299265).

The spelling of 20145163 in words is "twenty million, one hundred forty-five thousand, one hundred sixty-three".