20267 has 4 divisors (see below), whose sum is σ = 21840.
Its totient is φ = 18696.
The previous prime is 20261. The next prime is 20269. The reversal of 20267 is 76202.
20267 is nontrivially palindromic in base 12.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 20267 - 28 = 20011 is a prime.
It is a plaindrome in base 6.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20261) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767 + ... + 792.
It is an arithmetic number, because the mean of its divisors is an integer number (5460).
220267 is an apocalyptic number.
20267 is a deficient number, since it is larger than the sum of its proper divisors (1573).
20267 is a wasteful number, since it uses less digits than its factorization.
20267 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1572.
The product of its (nonzero) digits is 168, while the sum is 17.
The square root of 20267 is about 142.3622140879.
The cubic root of 20267 is about 27.2644341788.
Adding to 20267 its reverse (76202), we get a palindrome (96469).
The spelling of 20267 in words is "twenty thousand, two hundred sixty-seven".