20081236 has 24 divisors (see below), whose sum is σ = 40275200. Its totient is φ = 8582112.

The previous prime is 20081227. The next prime is 20081263. The reversal of 20081236 is 63218002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12190 + ... + 13738.

Almost surely, 2^20081236 is an apocalyptic number.

It is an amenable number.

20081236 is an abundant number, since it is smaller than the sum of its proper divisors (20193964).

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

20081236 is a wasteful number, since it uses less digits than its factorization.

20081236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20081236 is about 4481.2092118088. The cubic root of 20081236 is about 271.8087792389.

Adding to 20081236 its reverse (63218002), we get a palindrome (83299238).

The spelling of 20081236 in words is "twenty million, eighty-one thousand, two hundred thirty-six".