20108484 has 144 divisors (see below), whose sum is σ = 61326720. Its totient is φ = 5483520.

The previous prime is 20108483. The next prime is 20108489. The reversal of 20108484 is 48480102.

It is a super-2 number, since 2×20108484² = 808702257556512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20108483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195177 + ... + 195279.

It is an arithmetic number, because the mean of its divisors is an integer number (425880).

Almost surely, 2^20108484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20108484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30663360).

20108484 is an abundant number, since it is smaller than the sum of its proper divisors (41218236).

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

20108484 is a wasteful number, since it uses less digits than its factorization.

20108484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 20108484 is about 4484.2484320118. The cubic root of 20108484 is about 271.9316617535.

Adding to 20108484 its reverse (48480102), we get a palindrome (68588586).

The spelling of 20108484 in words is "twenty million, one hundred eight thousand, four hundred eighty-four".