18184866685 has 8 divisors (see below), whose sum is σ = 22037898456. Its totient is φ = 14403854400.

The previous prime is 18184866673. The next prime is 18184866719. The reversal of 18184866685 is 58666848181.

It can be written as a sum of positive squares in 4 ways, for example, as 6740574201 + 11444292484 = 82101^2 + 106978^2 .

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

It is not a de Polignac number, because 18184866685 - 2¹¹ = 18184864637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18004314 + ... + 18005323.

It is an arithmetic number, because the mean of its divisors is an integer number (2754737307).

Almost surely, 2^18184866685 is an apocalyptic number.

It is an amenable number.

18184866685 is a deficient number, since it is larger than the sum of its proper divisors (3853031771).

18184866685 is a wasteful number, since it uses less digits than its factorization.

18184866685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36009743.

The product of its digits is 17694720, while the sum is 61.

The spelling of 18184866685 in words is "eighteen billion, one hundred eighty-four million, eight hundred sixty-six thousand, six hundred eighty-five".