20982242 has 18 divisors (see below), whose sum is σ = 32673249. Its totient is φ = 10105680.

The previous prime is 20982239. The next prime is 20982253. The reversal of 20982242 is 24228902.

It can be written as a sum of positive squares in 2 ways, for example, as 14984641 + 5997601 = 3871^2 + 2449^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3239.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 265559 + ... + 265637.

Almost surely, 2^20982242 is an apocalyptic number.

20982242 is a deficient number, since it is larger than the sum of its proper divisors (11691007).

20982242 is an frugal number, since it uses more digits than its factorization.

20982242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20982242 is about 4580.6377285265. The cubic root of 20982242 is about 275.8146290797.

Multiplying 20982242 by its product of nonzero digits (4608), we get a square (96686171136 = 310944²).

The spelling of 20982242 in words is "twenty million, nine hundred eighty-two thousand, two hundred forty-two".