18197186271269 has 2 divisors, whose sum is σ = 18197186271270. Its totient is φ = 18197186271268.

The previous prime is 18197186271259. The next prime is 18197186271287. The reversal of 18197186271269 is 96217268179181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12496012900900 + 5701173370369 = 3534970^2 + 2387713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18197186271269 is a prime.

It is a super-2 number, since 2×18197186271269² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18197186271199 and 18197186271208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18197186271259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098593135634 + 9098593135635.

It is an arithmetic number, because the mean of its divisors is an integer number (9098593135635).

Almost surely, 2^{18197186271269} is an apocalyptic number.

It is an amenable number.

18197186271269 is a deficient number, since it is larger than the sum of its proper divisors (1).

18197186271269 is an equidigital number, since it uses as much as digits as its factorization.

18197186271269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 68.

The spelling of 18197186271269 in words is "eighteen trillion, one hundred ninety-seven billion, one hundred eighty-six million, two hundred seventy-one thousand, two hundred sixty-nine".