18168205 has 8 divisors (see below), whose sum is σ = 23783904. Its totient is φ = 13213200.

The previous prime is 18168203. The next prime is 18168211. The reversal of 18168205 is 50286181.

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

It is not a de Polignac number, because 18168205 - 2¹ = 18168203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18168203) 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, 165111 + ... + 165220.

It is an arithmetic number, because the mean of its divisors is an integer number (2972988).

Almost surely, 2^18168205 is an apocalyptic number.

It is an amenable number.

18168205 is a deficient number, since it is larger than the sum of its proper divisors (5615699).

18168205 is a wasteful number, since it uses less digits than its factorization.

18168205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330347.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 18168205 is about 4262.4177411418. The cubic root of 18168205 is about 262.8879464053.

It can be divided in two parts, 181 and 68205, that added together give a palindrome (68386).

The spelling of 18168205 in words is "eighteen million, one hundred sixty-eight thousand, two hundred five".