20186 has 4 divisors (see below), whose sum is σ = 30282. Its totient is φ = 10092.

The previous prime is 20183. The next prime is 20201. The reversal of 20186 is 68102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17161 + 3025 = 131^2 + 55^2 .

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (20183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045 + ... + 5048.

2²⁰¹⁸⁶ is an apocalyptic number.

20186 is a deficient number, since it is larger than the sum of its proper divisors (10096).

20186 is a wasteful number, since it uses less digits than its factorization.

20186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 20186 is about 142.0774436707. The cubic root of 20186 is about 27.2280635960.

Adding to 20186 its reverse (68102), we get a palindrome (88288).

The spelling of 20186 in words is "twenty thousand, one hundred eighty-six".