18105386669 has 2 divisors, whose sum is σ = 18105386670. Its totient is φ = 18105386668.

The previous prime is 18105386639. The next prime is 18105386681. The reversal of 18105386669 is 96668350181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17354900644 + 750486025 = 131738^2 + 27395^2 .

It is a cyclic number.

It is not a de Polignac number, because 18105386669 - 2²⁰ = 18104338093 is a prime.

It is a super-2 number, since 2×18105386669² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18105386669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18105386609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052693334 + 9052693335.

It is an arithmetic number, because the mean of its divisors is an integer number (9052693335).

Almost surely, 2^18105386669 is an apocalyptic number.

It is an amenable number.

18105386669 is a deficient number, since it is larger than the sum of its proper divisors (1).

18105386669 is an equidigital number, since it uses as much as digits as its factorization.

18105386669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 18105386669 in words is "eighteen billion, one hundred five million, three hundred eighty-six thousand, six hundred sixty-nine".