20075566 has 16 divisors (see below), whose sum is σ = 34611840. Its totient is φ = 8554680.

The previous prime is 20075563. The next prime is 20075567. The reversal of 20075566 is 66557002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20075563) 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 7 ways as a sum of consecutive naturals, for example, 1500 + ... + 6511.

It is an arithmetic number, because the mean of its divisors is an integer number (2163240).

Almost surely, 2^20075566 is an apocalyptic number.

20075566 is a deficient number, since it is larger than the sum of its proper divisors (14536274).

20075566 is a wasteful number, since it uses less digits than its factorization.

20075566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8199.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 20075566 is about 4480.5765254038. The cubic root of 20075566 is about 271.7831948103.

The spelling of 20075566 in words is "twenty million, seventy-five thousand, five hundred sixty-six".