20036564 has 24 divisors (see below), whose sum is σ = 38186400. Its totient is φ = 9162720.

The previous prime is 20036563. The next prime is 20036579. The reversal of 20036564 is 46563002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20036561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2342 + ... + 6749.

It is an arithmetic number, because the mean of its divisors is an integer number (1591100).

Almost surely, 2^20036564 is an apocalyptic number.

It is an amenable number.

20036564 is a deficient number, since it is larger than the sum of its proper divisors (18149836).

20036564 is a wasteful number, since it uses less digits than its factorization.

20036564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143 (or 9141 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 20036564 is about 4476.2220677710. Note that the first 3 decimals coincide. The cubic root of 20036564 is about 271.6070775664.

Adding to 20036564 its reverse (46563002), we get a palindrome (66599566).

The spelling of 20036564 in words is "twenty million, thirty-six thousand, five hundred sixty-four".