18409163 has 2 divisors, whose sum is σ = 18409164. Its totient is φ = 18409162.

The previous prime is 18409109. The next prime is 18409199. The reversal of 18409163 is 36190481.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18409163 is a prime.

It is equal to p_1175774 and since 18409163 and 1175774 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18409763) 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, 9204581 + 9204582.

It is an arithmetic number, because the mean of its divisors is an integer number (9204582).

Almost surely, 2^18409163 is an apocalyptic number.

18409163 is a deficient number, since it is larger than the sum of its proper divisors (1).

18409163 is an equidigital number, since it uses as much as digits as its factorization.

18409163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18409163 is about 4290.5900526618. The cubic root of 18409163 is about 264.0450403334.

The spelling of 18409163 in words is "eighteen million, four hundred nine thousand, one hundred sixty-three".