20039982 has 16 divisors (see below), whose sum is σ = 40124160. Its totient is φ = 6672632.

The previous prime is 20039959. The next prime is 20039983. The reversal of 20039982 is 28993002.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20039983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8683 + ... + 10745.

It is an arithmetic number, because the mean of its divisors is an integer number (2507760).

Almost surely, 2^20039982 is an apocalyptic number.

20039982 is an abundant number, since it is smaller than the sum of its proper divisors (20084178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20039982 is a wasteful number, since it uses less digits than its factorization.

20039982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 20039982 is about 4476.6038466677. The cubic root of 20039982 is about 271.6225210029.

The spelling of 20039982 in words is "twenty million, thirty-nine thousand, nine hundred eighty-two".