20005982 has 8 divisors (see below), whose sum is σ = 30029616. Its totient is φ = 9996112.

The previous prime is 20005981. The next prime is 20006003. The reversal of 20005982 is 28950002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778 + ... + 6570.

It is an arithmetic number, because the mean of its divisors is an integer number (3753702).

Almost surely, 2^20005982 is an apocalyptic number.

20005982 is a deficient number, since it is larger than the sum of its proper divisors (10023634).

20005982 is a wasteful number, since it uses less digits than its factorization.

20005982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6882.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20005982 is about 4472.8047129290. The cubic root of 20005982 is about 271.4688217054.

Adding to 20005982 its reverse (28950002), we get a palindrome (48955984).

The spelling of 20005982 in words is "twenty million, five thousand, nine hundred eighty-two".