20566285 has 8 divisors (see below), whose sum is σ = 24732000. Its totient is φ = 16418064.

The previous prime is 20566267. The next prime is 20566331. The reversal of 20566285 is 58266502.

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

It is a cyclic number.

It is not a de Polignac number, because 20566285 - 2⁹ = 20565773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20566285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1627 + ... + 6616.

It is an arithmetic number, because the mean of its divisors is an integer number (3091500).

Almost surely, 2^20566285 is an apocalyptic number.

It is an amenable number.

20566285 is a deficient number, since it is larger than the sum of its proper divisors (4165715).

20566285 is an equidigital number, since it uses as much as digits as its factorization.

20566285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8747.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 20566285 is about 4535.0066152102. The cubic root of 20566285 is about 273.9798456058.

The spelling of 20566285 in words is "twenty million, five hundred sixty-six thousand, two hundred eighty-five".