20000566 has 8 divisors (see below), whose sum is σ = 30059784. Its totient is φ = 9980640.

The previous prime is 20000543. The next prime is 20000567. The reversal of 20000566 is 66500002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000567) by changing a digit.

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, 8515 + ... + 10606.

It is an arithmetic number, because the mean of its divisors is an integer number (3757473).

Almost surely, 2^20000566 is an apocalyptic number.

20000566 is a deficient number, since it is larger than the sum of its proper divisors (10059218).

20000566 is a wasteful number, since it uses less digits than its factorization.

20000566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19646.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20000566 is about 4472.1992352756. The cubic root of 20000566 is about 271.4443222360. Note that the first 3 decimals are identical.

Adding to 20000566 its reverse (66500002), we get a palindrome (86500568).

The spelling of 20000566 in words is "twenty million, five hundred sixty-six", and thus it is an aban number.