20283566 has 8 divisors (see below), whose sum is σ = 30810720. Its totient is φ = 10013328.

The previous prime is 20283563. The next prime is 20283581. The reversal of 20283566 is 66538202.

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

It is a super-2 number, since 2×20283566² = 822846099352712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20283563) 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, 64031 + ... + 64346.

It is an arithmetic number, because the mean of its divisors is an integer number (3851340).

Almost surely, 2^20283566 is an apocalyptic number.

20283566 is a deficient number, since it is larger than the sum of its proper divisors (10527154).

20283566 is a wasteful number, since it uses less digits than its factorization.

20283566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128458.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20283566 is about 4503.7280113257. The cubic root of 20283566 is about 272.7186069502.

The spelling of 20283566 in words is "twenty million, two hundred eighty-three thousand, five hundred sixty-six".