18855409163 has 2 divisors, whose sum is σ = 18855409164. Its totient is φ = 18855409162.

The previous prime is 18855409147. The next prime is 18855409229. The reversal of 18855409163 is 36190455881.

It is a weak prime.

It is an emirp because it is prime and its reverse (36190455881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18855409163 - 2⁴ = 18855409147 is a prime.

It is not a weakly prime, because it can be changed into another prime (18855409063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9427704581 + 9427704582.

It is an arithmetic number, because the mean of its divisors is an integer number (9427704582).

Almost surely, 2^18855409163 is an apocalyptic number.

18855409163 is a deficient number, since it is larger than the sum of its proper divisors (1).

18855409163 is an equidigital number, since it uses as much as digits as its factorization.

18855409163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 18855409163 in words is "eighteen billion, eight hundred fifty-five million, four hundred nine thousand, one hundred sixty-three".