18768163 has 2 divisors, whose sum is σ = 18768164. Its totient is φ = 18768162.

The previous prime is 18768137. The next prime is 18768179. The reversal of 18768163 is 36186781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18768163 is a prime.

It is not a weakly prime, because it can be changed into another prime (18768103) 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, 9384081 + 9384082.

It is an arithmetic number, because the mean of its divisors is an integer number (9384082).

Almost surely, 2^18768163 is an apocalyptic number.

18768163 is a deficient number, since it is larger than the sum of its proper divisors (1).

18768163 is an equidigital number, since it uses as much as digits as its factorization.

18768163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 18768163 is about 4332.2237938500. The cubic root of 18768163 is about 265.7503971342.

The spelling of 18768163 in words is "eighteen million, seven hundred sixty-eight thousand, one hundred sixty-three".