20164636 has 12 divisors (see below), whose sum is σ = 35321328. Its totient is φ = 10072832.

The previous prime is 20164631. The next prime is 20164649. The reversal of 20164636 is 63646102.

It is a super-2 number, since 2×20164636² = 813225090024992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4860 + ... + 7996.

It is an arithmetic number, because the mean of its divisors is an integer number (2943444).

Almost surely, 2^20164636 is an apocalyptic number.

It is an amenable number.

20164636 is a deficient number, since it is larger than the sum of its proper divisors (15156692).

20164636 is a wasteful number, since it uses less digits than its factorization.

20164636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748 (or 4746 counting only the distinct ones).

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

The square root of 20164636 is about 4490.5050940846. The cubic root of 20164636 is about 272.1845453216.

The spelling of 20164636 in words is "twenty million, one hundred sixty-four thousand, six hundred thirty-six".