20066 has 8 divisors (see below), whose sum is σ = 30720. Its totient is φ = 9828.

The previous prime is 20063. The next prime is 20071. The reversal of 20066 is 66002.

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

20066 is a modest number, since divided by 66 gives 2 as remainder.

It is a plaindrome in base 7.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 20066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95 + ... + 221.

It is an arithmetic number, because the mean of its divisors is an integer number (3840).

2²⁰⁰⁶⁶ is an apocalyptic number.

20066 is a deficient number, since it is larger than the sum of its proper divisors (10654).

20066 is a wasteful number, since it uses less digits than its factorization.

20066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20066 is about 141.6545092823. The cubic root of 20066 is about 27.1740019754.

Adding to 20066 its reverse (66002), we get a palindrome (86068).

The spelling of 20066 in words is "twenty thousand, sixty-six".