20017982 has 16 divisors (see below), whose sum is σ = 31743360. Its totient is φ = 9441432.

The previous prime is 20017973. The next prime is 20017997. The reversal of 20017982 is 28971002.

It is a happy number.

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, 8993 + ... + 10995.

It is an arithmetic number, because the mean of its divisors is an integer number (1983960).

Almost surely, 2^20017982 is an apocalyptic number.

20017982 is a deficient number, since it is larger than the sum of its proper divisors (11725378).

20017982 is a wasteful number, since it uses less digits than its factorization.

20017982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 20017982 is about 4474.1459520226. The cubic root of 20017982 is about 271.5230883867.

Adding to 20017982 its reverse (28971002), we get a palindrome (48988984).

The spelling of 20017982 in words is "twenty million, seventeen thousand, nine hundred eighty-two".