20120636 has 24 divisors (see below), whose sum is σ = 36014160. Its totient is φ = 9833472.

The previous prime is 20120629. The next prime is 20120641. The reversal of 20120636 is 63602102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51530 + ... + 51918.

It is an arithmetic number, because the mean of its divisors is an integer number (1500590).

Almost surely, 2^20120636 is an apocalyptic number.

It is an amenable number.

20120636 is a deficient number, since it is larger than the sum of its proper divisors (15893524).

20120636 is a wasteful number, since it uses less digits than its factorization.

20120636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20120636 is about 4485.6031924369. The cubic root of 20120636 is about 271.9864288212.

Adding to 20120636 its reverse (63602102), we get a palindrome (83722738).

The spelling of 20120636 in words is "twenty million, one hundred twenty thousand, six hundred thirty-six".