20027 has 4 divisors (see below), whose sum is σ = 22896. Its totient is φ = 17160.

The previous prime is 20023. The next prime is 20029. The reversal of 20027 is 72002.

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 20027 - 2² = 20023 is a prime.

It is a Duffinian number.

20027 is a modest number, since divided by 27 gives 20 as remainder.

It is not an unprimeable number, because it can be changed into a prime (20021) 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, 1424 + ... + 1437.

It is an arithmetic number, because the mean of its divisors is an integer number (5724).

2²⁰⁰²⁷ is an apocalyptic number.

20027 is a deficient number, since it is larger than the sum of its proper divisors (2869).

20027 is an equidigital number, since it uses as much as digits as its factorization.

20027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868.

The product of its (nonzero) digits is 28, while the sum is 11.

The square root of 20027 is about 141.5167834569. The cubic root of 20027 is about 27.1563855526.

Adding to 20027 its reverse (72002), we get a palindrome (92029).

The spelling of 20027 in words is "twenty thousand, twenty-seven", and thus it is an iban number.