20285863 has 8 divisors (see below), whose sum is σ = 22996400. Its totient is φ = 17739648.

The previous prime is 20285831. The next prime is 20285869. The reversal of 20285863 is 36858202.

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 20285863 - 2⁵ = 20285831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285869) 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 7 ways as a sum of consecutive naturals, for example, 40818 + ... + 41311.

It is an arithmetic number, because the mean of its divisors is an integer number (2874550).

Almost surely, 2^20285863 is an apocalyptic number.

20285863 is a deficient number, since it is larger than the sum of its proper divisors (2710537).

20285863 is a wasteful number, since it uses less digits than its factorization.

20285863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82161.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 20285863 is about 4503.9830150657. The cubic root of 20285863 is about 272.7289011788.

The spelling of 20285863 in words is "twenty million, two hundred eighty-five thousand, eight hundred sixty-three".