18665434369 has 8 divisors (see below), whose sum is σ = 18800548928. Its totient is φ = 18530525520.

The previous prime is 18665434331. The next prime is 18665434379. The reversal of 18665434369 is 96343456681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18665434369 - 2⁷ = 18665434241 is a prime.

It is a super-2 number, since 2×18665434369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18665434379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133084 + ... + 234610.

It is an arithmetic number, because the mean of its divisors is an integer number (2350068616).

Almost surely, 2^18665434369 is an apocalyptic number.

It is an amenable number.

18665434369 is a deficient number, since it is larger than the sum of its proper divisors (135114559).

18665434369 is a wasteful number, since it uses less digits than its factorization.

18665434369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102855.

The product of its digits is 11197440, while the sum is 55.

The spelling of 18665434369 in words is "eighteen billion, six hundred sixty-five million, four hundred thirty-four thousand, three hundred sixty-nine".