2113636 has 48 divisors (see below), whose sum is σ = 4636800. Its totient is φ = 822528.

The previous prime is 2113609. The next prime is 2113651. The reversal of 2113636 is 6363112.

2113636 is nontrivially palindromic in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15360 + ... + 15496.

It is an arithmetic number, because the mean of its divisors is an integer number (96600).

2^2113636 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 2113636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2318400).

2113636 is an abundant number, since it is smaller than the sum of its proper divisors (2523164).

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

2113636 is a wasteful number, since it uses less digits than its factorization.

2113636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 194 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

The square root of 2113636 is about 1453.8349287316. The cubic root of 2113636 is about 128.3344929713.

Adding to 2113636 its reverse (6363112), we get a palindrome (8476748).

The spelling of 2113636 in words is "two million, one hundred thirteen thousand, six hundred thirty-six".