18168267269 has 2 divisors, whose sum is σ = 18168267270. Its totient is φ = 18168267268.

The previous prime is 18168267239. The next prime is 18168267277. The reversal of 18168267269 is 96276286181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17599206244 + 569061025 = 132662^2 + 23855^2 .

It is a cyclic number.

It is not a de Polignac number, because 18168267269 - 2¹² = 18168263173 is a prime.

It is a super-2 number, since 2×18168267269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18168267239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9084133634 + 9084133635.

It is an arithmetic number, because the mean of its divisors is an integer number (9084133635).

Almost surely, 2^18168267269 is an apocalyptic number.

It is an amenable number.

18168267269 is a deficient number, since it is larger than the sum of its proper divisors (1).

18168267269 is an equidigital number, since it uses as much as digits as its factorization.

18168267269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The spelling of 18168267269 in words is "eighteen billion, one hundred sixty-eight million, two hundred sixty-seven thousand, two hundred sixty-nine".