20943163 has 2 divisors, whose sum is σ = 20943164. Its totient is φ = 20943162.

The previous prime is 20943157. The next prime is 20943199. The reversal of 20943163 is 36134902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20943163 - 2¹⁷ = 20812091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20943103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10471581 + 10471582.

It is an arithmetic number, because the mean of its divisors is an integer number (10471582).

Almost surely, 2^20943163 is an apocalyptic number.

20943163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20943163 is an equidigital number, since it uses as much as digits as its factorization.

20943163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20943163 is about 4576.3700680780. The cubic root of 20943163 is about 275.6432896134.

The spelling of 20943163 in words is "twenty million, nine hundred forty-three thousand, one hundred sixty-three".