20108508 has 24 divisors (see below), whose sum is σ = 53622912. Its totient is φ = 5745264.

The previous prime is 20108497. The next prime is 20108521. The reversal of 20108508 is 80580102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119610 + ... + 119777.

It is an arithmetic number, because the mean of its divisors is an integer number (2234288).

Almost surely, 2^20108508 is an apocalyptic number.

20108508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20108508 is an abundant number, since it is smaller than the sum of its proper divisors (33514404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20108508 is a wasteful number, since it uses less digits than its factorization.

20108508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239401 (or 239399 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 20108508 is about 4484.2511080447. The cubic root of 20108508 is about 271.9317699393.

The spelling of 20108508 in words is "twenty million, one hundred eight thousand, five hundred eight".