20708 has 12 divisors (see below), whose sum is σ = 37632. Its totient is φ = 9960.

The previous prime is 20707. The next prime is 20717. The reversal of 20708 is 80702.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (20707) 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, 41 + ... + 207.

It is an arithmetic number, because the mean of its divisors is an integer number (3136).

2²⁰⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

20708 is a deficient number, since it is larger than the sum of its proper divisors (16924).

20708 is a wasteful number, since it uses less digits than its factorization.

20708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20708 is about 143.9027449356. The cubic root of 20708 is about 27.4607705110.

The spelling of 20708 in words is "twenty thousand, seven hundred eight".