20108136 has 64 divisors (see below), whose sum is σ = 52617600. Its totient is φ = 6395648.

The previous prime is 20108129. The next prime is 20108149. The reversal of 20108136 is 63180102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116146 + ... + 116318.

It is an arithmetic number, because the mean of its divisors is an integer number (822150).

Almost surely, 2^20108136 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 20108136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26308800).

20108136 is an abundant number, since it is smaller than the sum of its proper divisors (32509464).

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

20108136 is a wasteful number, since it uses less digits than its factorization.

20108136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20108136 is about 4484.2096293550. The cubic root of 20108136 is about 271.9300930497.

Adding to 20108136 its reverse (63180102), we get a palindrome (83288238).

The spelling of 20108136 in words is "twenty million, one hundred eight thousand, one hundred thirty-six".