20055 has 16 divisors (see below), whose sum is σ = 36864. Its totient is φ = 9120.

The previous prime is 20051. The next prime is 20063. The reversal of 20055 is 55002.

20055 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 20055 - 2² = 20051 is a prime.

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 20055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10 + ... + 200.

It is an arithmetic number, because the mean of its divisors is an integer number (2304).

2²⁰⁰⁵⁵ is an apocalyptic number.

20055 is a deficient number, since it is larger than the sum of its proper divisors (16809).

20055 is a wasteful number, since it uses less digits than its factorization.

20055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206.

The product of its (nonzero) digits is 50, while the sum is 12.

The square root of 20055 is about 141.6156770983. The cubic root of 20055 is about 27.1690355536.

Adding to 20055 its reverse (55002), we get a palindrome (75057).

The spelling of 20055 in words is "twenty thousand, fifty-five".