20548 has 12 divisors (see below), whose sum is σ = 39312. Its totient is φ = 9320.

The previous prime is 20543. The next prime is 20549. The reversal of 20548 is 84502.

It is a happy number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (20543) 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, 190 + ... + 277.

It is an arithmetic number, because the mean of its divisors is an integer number (3276).

2²⁰⁵⁴⁸ is an apocalyptic number.

It is an amenable number.

20548 is a deficient number, since it is larger than the sum of its proper divisors (18764).

20548 is a wasteful number, since it uses less digits than its factorization.

20548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20548 is about 143.3457358975. The cubic root of 20548 is about 27.3898625186.

It can be divided in two parts, 205 and 48, that added together give a triangular number (253 = T₂₂).

The spelling of 20548 in words is "twenty thousand, five hundred forty-eight".