20982549 has 8 divisors (see below), whose sum is σ = 31973440. Its totient is φ = 11990016.

The previous prime is 20982503. The next prime is 20982553. The reversal of 20982549 is 94528902.

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

It is not a de Polignac number, because 20982549 - 2¹¹ = 20980501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20982569) 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, 499564 + ... + 499605.

It is an arithmetic number, because the mean of its divisors is an integer number (3996680).

Almost surely, 2^20982549 is an apocalyptic number.

It is an amenable number.

20982549 is a deficient number, since it is larger than the sum of its proper divisors (10990891).

20982549 is an equidigital number, since it uses as much as digits as its factorization.

20982549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999179.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20982549 is about 4580.6712390216. The cubic root of 20982549 is about 275.8159742597.

The spelling of 20982549 in words is "twenty million, nine hundred eighty-two thousand, five hundred forty-nine".