18217396363 has 2 divisors, whose sum is σ = 18217396364. Its totient is φ = 18217396362.

The previous prime is 18217396343. The next prime is 18217396447. The reversal of 18217396363 is 36369371281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18217396363 - 2³³ = 9627461771 is a prime.

It is not a weakly prime, because it can be changed into another prime (18217396303) 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, 9108698181 + 9108698182.

It is an arithmetic number, because the mean of its divisors is an integer number (9108698182).

Almost surely, 2^18217396363 is an apocalyptic number.

18217396363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18217396363 is an equidigital number, since it uses as much as digits as its factorization.

18217396363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The spelling of 18217396363 in words is "eighteen billion, two hundred seventeen million, three hundred ninety-six thousand, three hundred sixty-three".