20248 has 8 divisors (see below), whose sum is σ = 37980. Its totient is φ = 10120.

The previous prime is 20233. The next prime is 20249. The reversal of 20248 is 84202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 12 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258 + ... + 1273.

2²⁰²⁴⁸ is an apocalyptic number.

It is an amenable number.

20248 is a deficient number, since it is larger than the sum of its proper divisors (17732).

20248 is a wasteful number, since it uses less digits than its factorization.

20248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537 (or 2533 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 20248 is about 142.2954672504. The cubic root of 20248 is about 27.2559115194.

The spelling of 20248 in words is "twenty thousand, two hundred forty-eight".