20982241 has 12 divisors (see below), whose sum is σ = 24487428. Its totient is φ = 17926272.

The previous prime is 20982239. The next prime is 20982253. The reversal of 20982241 is 14228902.

It can be written as a sum of positive squares in 2 ways, for example, as 8976016 + 12006225 = 2996^2 + 3465^2 .

It is not a de Polignac number, because 20982241 - 2¹ = 20982239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20982211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21925 + ... + 22861.

It is an arithmetic number, because the mean of its divisors is an integer number (2040619).

Almost surely, 2^20982241 is an apocalyptic number.

It is an amenable number.

20982241 is a deficient number, since it is larger than the sum of its proper divisors (3505187).

20982241 is an equidigital number, since it uses as much as digits as its factorization.

20982241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20982241 is about 4580.6376193713. The cubic root of 20982241 is about 275.8146246980.

The spelling of 20982241 in words is "twenty million, nine hundred eighty-two thousand, two hundred forty-one".