20927 has 4 divisors (see below), whose sum is σ = 22176. Its totient is φ = 19680.

The previous prime is 20921. The next prime is 20929. The reversal of 20927 is 72902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72902 = 2 ⋅36451.

It is a cyclic number.

It is not a de Polignac number, because 20927 - 2¹² = 16831 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 20899 and 20908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20921) 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, 599 + ... + 632.

It is an arithmetic number, because the mean of its divisors is an integer number (5544).

2²⁰⁹²⁷ is an apocalyptic number.

20927 is a deficient number, since it is larger than the sum of its proper divisors (1249).

20927 is a wasteful number, since it uses less digits than its factorization.

20927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 20927 is about 144.6616742610. The cubic root of 20927 is about 27.5572361628.

The spelling of 20927 in words is "twenty thousand, nine hundred twenty-seven".