20283 has 4 divisors (see below), whose sum is σ = 27048. Its totient is φ = 13520.

The previous prime is 20269. The next prime is 20287. The reversal of 20283 is 38202.

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 20283 - 2⁶ = 20219 is a prime.

It is a super-2 number, since 2×20283² = 822800178, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (20287) 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, 3378 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (6762).

2²⁰²⁸³ is an apocalyptic number.

20283 is a deficient number, since it is larger than the sum of its proper divisors (6765).

20283 is an equidigital number, since it uses as much as digits as its factorization.

20283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20283 is about 142.4183976879. The cubic root of 20283 is about 27.2716070247.

Adding to 20283 its reverse (38202), we get a palindrome (58485).

It can be divided in two parts, 2028 and 3, that multiplied together give a square (6084 = 78²).

The spelling of 20283 in words is "twenty thousand, two hundred eighty-three".