18265369069 has 4 divisors (see below), whose sum is σ = 18265641660. Its totient is φ = 18265096480.

The previous prime is 18265369061. The next prime is 18265369079. The reversal of 18265369069 is 96096356281.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5266404900 + 12998964169 = 72570^2 + 114013^2 .

It is a cyclic number.

It is not a de Polignac number, because 18265369069 - 2³ = 18265369061 is a prime.

It is a super-2 number, since 2×18265369069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18265369061) 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 in 3 ways as a sum of consecutive naturals, for example, 41697 + ... + 195625.

It is an arithmetic number, because the mean of its divisors is an integer number (4566410415).

Almost surely, 2^18265369069 is an apocalyptic number.

It is an amenable number.

18265369069 is a deficient number, since it is larger than the sum of its proper divisors (272591).

18265369069 is a wasteful number, since it uses less digits than its factorization.

18265369069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272590.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 18265369069 in words is "eighteen billion, two hundred sixty-five million, three hundred sixty-nine thousand, sixty-nine".