20017285 has 8 divisors (see below), whose sum is σ = 24053760. Its totient is φ = 15991824.

The previous prime is 20017247. The next prime is 20017301. The reversal of 20017285 is 58271002.

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 20017285 - 2¹⁷ = 19886213 is a prime.

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, 1996 + ... + 6634.

It is an arithmetic number, because the mean of its divisors is an integer number (3006720).

Almost surely, 2^20017285 is an apocalyptic number.

It is an amenable number.

20017285 is a deficient number, since it is larger than the sum of its proper divisors (4036475).

20017285 is an equidigital number, since it uses as much as digits as its factorization.

20017285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20017285 is about 4474.0680593840. The cubic root of 20017285 is about 271.5199369903.

Adding to 20017285 its reverse (58271002), we get a palindrome (78288287).

It can be divided in two parts, 20017 and 285, that added together give a palindrome (20302).

The spelling of 20017285 in words is "twenty million, seventeen thousand, two hundred eighty-five".