18168136969 has 8 divisors (see below), whose sum is σ = 18292468160. Its totient is φ = 18043963056.

The previous prime is 18168136967. The next prime is 18168136991. The reversal of 18168136969 is 96963186181.

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 18168136969 - 2¹ = 18168136967 is a prime.

It is a super-2 number, since 2×18168136969² (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 (18168136967) 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 7 ways as a sum of consecutive naturals, for example, 197347 + ... + 274375.

It is an arithmetic number, because the mean of its divisors is an integer number (2286558520).

Almost surely, 2^18168136969 is an apocalyptic number.

It is an amenable number.

18168136969 is a deficient number, since it is larger than the sum of its proper divisors (124331191).

18168136969 is a wasteful number, since it uses less digits than its factorization.

18168136969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78639.

The product of its digits is 3359232, while the sum is 58.

The spelling of 18168136969 in words is "eighteen billion, one hundred sixty-eight million, one hundred thirty-six thousand, nine hundred sixty-nine".