18700163 has 2 divisors, whose sum is σ = 18700164. Its totient is φ = 18700162.

The previous prime is 18700117. The next prime is 18700183. The reversal of 18700163 is 36100781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18700163 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (18700103) 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, 9350081 + 9350082.

It is an arithmetic number, because the mean of its divisors is an integer number (9350082).

Almost surely, 2^18700163 is an apocalyptic number.

18700163 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700163 is an equidigital number, since it uses as much as digits as its factorization.

18700163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 18700163 is about 4324.3685088114. The cubic root of 18700163 is about 265.4290569341.

The spelling of 18700163 in words is "eighteen million, seven hundred thousand, one hundred sixty-three".