20836136 has 16 divisors (see below), whose sum is σ = 39709140. Its totient is φ = 10247040.

The previous prime is 20836121. The next prime is 20836187. The reversal of 20836136 is 63163802.

It can be written as a sum of positive squares in 2 ways, for example, as 15952036 + 4884100 = 3994^2 + 2210^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20836099 and 20836108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20861 + ... + 21836.

Almost surely, 2^20836136 is an apocalyptic number.

It is an amenable number.

20836136 is a deficient number, since it is larger than the sum of its proper divisors (18873004).

20836136 is a wasteful number, since it uses less digits than its factorization.

20836136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42764 (or 42760 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20836136 is about 4564.6616523024. The cubic root of 20836136 is about 275.1729424565.

Adding to 20836136 its reverse (63163802), we get a palindrome (83999938).

The spelling of 20836136 in words is "twenty million, eight hundred thirty-six thousand, one hundred thirty-six".