20886736 has 20 divisors (see below), whose sum is σ = 43581412. Its totient is φ = 9639936.

The previous prime is 20886713. The next prime is 20886739. The reversal of 20886736 is 63768802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2016400 + 18870336 = 1420^2 + 4344^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50001 + ... + 50416.

Almost surely, 2^20886736 is an apocalyptic number.

20886736 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20886736 is an abundant number, since it is smaller than the sum of its proper divisors (22694676).

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

20886736 is a wasteful number, since it uses less digits than its factorization.

20886736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100438 (or 100432 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20886736 is about 4570.2008708590. The cubic root of 20886736 is about 275.3955124333.

The spelling of 20886736 in words is "twenty million, eight hundred eighty-six thousand, seven hundred thirty-six".