20910163 has 2 divisors, whose sum is σ = 20910164. Its totient is φ = 20910162.

The previous prime is 20910157. The next prime is 20910167. The reversal of 20910163 is 36101902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20910163 - 2¹⁷ = 20779091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20910167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10455081 + 10455082.

It is an arithmetic number, because the mean of its divisors is an integer number (10455082).

Almost surely, 2^20910163 is an apocalyptic number.

20910163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20910163 is an equidigital number, since it uses as much as digits as its factorization.

20910163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20910163 is about 4572.7631690259. The cubic root of 20910163 is about 275.4984370846.

The spelling of 20910163 in words is "twenty million, nine hundred ten thousand, one hundred sixty-three".