2011117836 has 96 divisors (see below), whose sum is σ = 5791313920. Its totient is φ = 528954624.

The previous prime is 2011117819. The next prime is 2011117847. The reversal of 2011117836 is 6387111102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431205 + ... + 435843.

Almost surely, 2^2011117836 is an apocalyptic number.

2011117836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011117836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895656960).

2011117836 is an abundant number, since it is smaller than the sum of its proper divisors (3780196084).

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

2011117836 is a wasteful number, since it uses less digits than its factorization.

2011117836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 2011117836 is about 44845.4884687412. The cubic root of 2011117836 is about 1262.2513365243.

Adding to 2011117836 its reverse (6387111102), we get a palindrome (8398228938).

The spelling of 2011117836 in words is "two billion, eleven million, one hundred seventeen thousand, eight hundred thirty-six".