20017288 has 16 divisors (see below), whose sum is σ = 37759680. Its totient is φ = 9948048.

The previous prime is 20017247. The next prime is 20017301. The reversal of 20017288 is 88271002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6156 + ... + 8827.

It is an arithmetic number, because the mean of its divisors is an integer number (2359980).

Almost surely, 2^20017288 is an apocalyptic number.

It is an amenable number.

20017288 is a deficient number, since it is larger than the sum of its proper divisors (17742392).

20017288 is a wasteful number, since it uses less digits than its factorization.

20017288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15156 (or 15152 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 20017288 is about 4474.0683946493. The cubic root of 20017288 is about 271.5199505546.

The spelling of 20017288 in words is "twenty million, seventeen thousand, two hundred eighty-eight".