20101136 has 40 divisors (see below), whose sum is σ = 42788928. Its totient is φ = 9072000.

The previous prime is 20101129. The next prime is 20101141. The reversal of 20101136 is 63110102.

It is a self number, because there is not a number n which added to its sum of digits gives 20101136.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31541 + ... + 32171.

Almost surely, 2^20101136 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 20101136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21394464).

20101136 is an abundant number, since it is smaller than the sum of its proper divisors (22687792).

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

20101136 is a wasteful number, since it uses less digits than its factorization.

20101136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20101136 is about 4483.4290448272. The cubic root of 20101136 is about 271.8985348191.

Adding to 20101136 its reverse (63110102), we get a palindrome (83211238).

The spelling of 20101136 in words is "twenty million, one hundred one thousand, one hundred thirty-six".