18665364484469 has 2 divisors, whose sum is σ = 18665364484470. Its totient is φ = 18665364484468.

The previous prime is 18665364484457. The next prime is 18665364484477. The reversal of 18665364484469 is 96448446356681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18468179641444 + 197184843025 = 4297462^2 + 444055^2 .

It is a cyclic number.

It is not a de Polignac number, because 18665364484469 - 2⁴ = 18665364484453 is a prime.

It is a super-2 number, since 2×18665364484469² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18665364484396 and 18665364484405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18665364484489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9332682242234 + 9332682242235.

It is an arithmetic number, because the mean of its divisors is an integer number (9332682242235).

Almost surely, 2^{18665364484469} is an apocalyptic number.

It is an amenable number.

18665364484469 is a deficient number, since it is larger than the sum of its proper divisors (1).

18665364484469 is an equidigital number, since it uses as much as digits as its factorization.

18665364484469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2866544640, while the sum is 74.

The spelling of 18665364484469 in words is "eighteen trillion, six hundred sixty-five billion, three hundred sixty-four million, four hundred eighty-four thousand, four hundred sixty-nine".