20108 has 12 divisors (see below), whose sum is σ = 38472. Its totient is φ = 9120.

The previous prime is 20107. The next prime is 20113. The reversal of 20108 is 80102.

It is a Harshad number since it is a multiple of its sum of digits (11).

20108 is a modest number, since divided by 108 gives 20 as remainder.

It is not an unprimeable number, because it can be changed into a prime (20101) 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 in 3 ways as a sum of consecutive naturals, for example, 185 + ... + 272.

It is an arithmetic number, because the mean of its divisors is an integer number (3206).

2²⁰¹⁰⁸ is an apocalyptic number.

It is an amenable number.

20108 is a deficient number, since it is larger than the sum of its proper divisors (18364).

20108 is a wasteful number, since it uses less digits than its factorization.

20108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 20108 is about 141.8026798054. The cubic root of 20108 is about 27.1929479988.

It can be divided in two parts, 20 and 108, that added together give a 7-th power (128 = 2⁷).

The spelling of 20108 in words is "twenty thousand, one hundred eight".