20000636 has 12 divisors (see below), whose sum is σ = 37060128. Its totient is φ = 9412032.

The previous prime is 20000623. The next prime is 20000641. The reversal of 20000636 is 63600002.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

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, 146996 + ... + 147131.

It is an arithmetic number, because the mean of its divisors is an integer number (3088344).

Almost surely, 2^20000636 is an apocalyptic number.

It is an amenable number.

20000636 is a deficient number, since it is larger than the sum of its proper divisors (17059492).

20000636 is a wasteful number, since it uses less digits than its factorization.

20000636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294148 (or 294146 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20000636 is about 4472.2070613960. The cubic root of 20000636 is about 271.4446389117. Note that the first 3 decimals are identical.

Adding to 20000636 its reverse (63600002), we get a palindrome (83600638).

The spelling of 20000636 in words is "twenty million, six hundred thirty-six", and thus it is an aban number.