18059917 has 8 divisors (see below), whose sum is σ = 18514496. Its totient is φ = 17610912.

The previous prime is 18059903. The next prime is 18059929. The reversal of 18059917 is 71995081.

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 a de Polignac number, because none of the positive numbers 2^k-18059917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18059917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18059317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5593 + ... + 8209.

It is an arithmetic number, because the mean of its divisors is an integer number (2314312).

Almost surely, 2^18059917 is an apocalyptic number.

It is an amenable number.

18059917 is a deficient number, since it is larger than the sum of its proper divisors (454579).

18059917 is a wasteful number, since it uses less digits than its factorization.

18059917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 18059917 is about 4249.6961067822. The cubic root of 18059917 is about 262.3646080330.

The spelling of 18059917 in words is "eighteen million, fifty-nine thousand, nine hundred seventeen".