18955163 has 2 divisors, whose sum is σ = 18955164. Its totient is φ = 18955162.

The previous prime is 18955127. The next prime is 18955169. The reversal of 18955163 is 36155981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18955163 - 2⁶ = 18955099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18955169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9477581 + 9477582.

It is an arithmetic number, because the mean of its divisors is an integer number (9477582).

Almost surely, 2^18955163 is an apocalyptic number.

18955163 is a deficient number, since it is larger than the sum of its proper divisors (1).

18955163 is an equidigital number, since it uses as much as digits as its factorization.

18955163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 18955163 is about 4353.7527490660. The cubic root of 18955163 is about 266.6300993261.

The spelling of 18955163 in words is "eighteen million, nine hundred fifty-five thousand, one hundred sixty-three".