20416636 has 12 divisors (see below), whose sum is σ = 35790160. Its totient is φ = 10190880.

The previous prime is 20416603. The next prime is 20416661. The reversal of 20416636 is 63661402.

It is a congruent number.

It is an unprimeable number.

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, 1521 + ... + 6568.

Almost surely, 2^20416636 is an apocalyptic number.

It is an amenable number.

20416636 is a deficient number, since it is larger than the sum of its proper divisors (15373524).

20416636 is a wasteful number, since it uses less digits than its factorization.

20416636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8724 (or 8722 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20416636 is about 4518.4771771029. The cubic root of 20416636 is about 273.3136961238.

The spelling of 20416636 in words is "twenty million, four hundred sixteen thousand, six hundred thirty-six".