20017232 has 20 divisors (see below), whose sum is σ = 39092736. Its totient is φ = 9928800.

The previous prime is 20017229. The next prime is 20017237. The reversal of 20017232 is 23271002.

It is a self number, because there is not a number n which added to its sum of digits gives 20017232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20017237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894 + ... + 6957.

Almost surely, 2^20017232 is an apocalyptic number.

It is an amenable number.

20017232 is a deficient number, since it is larger than the sum of its proper divisors (19075504).

20017232 is a wasteful number, since it uses less digits than its factorization.

20017232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9986 (or 9980 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20017232 is about 4474.0621363589. The cubic root of 20017232 is about 271.5196973546.

Adding to 20017232 its reverse (23271002), we get a palindrome (43288234).

The spelling of 20017232 in words is "twenty million, seventeen thousand, two hundred thirty-two".