20982341 has 4 divisors (see below), whose sum is σ = 21705900. Its totient is φ = 20258784.

The previous prime is 20982337. The next prime is 20982359. The reversal of 20982341 is 14328902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8584900 + 12397441 = 2930^2 + 3521^2 .

It is a cyclic number.

It is not a de Polignac number, because 20982341 - 2² = 20982337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 723529 = 20982341 / (2 + 0 + 9 + 8 + 2 + 3 + 4 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20982331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361736 + ... + 361793.

It is an arithmetic number, because the mean of its divisors is an integer number (5426475).

Almost surely, 2^20982341 is an apocalyptic number.

It is an amenable number.

20982341 is a deficient number, since it is larger than the sum of its proper divisors (723559).

20982341 is an equidigital number, since it uses as much as digits as its factorization.

20982341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723558.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20982341 is about 4580.6485348693. The cubic root of 20982341 is about 275.8150628688.

The spelling of 20982341 in words is "twenty million, nine hundred eighty-two thousand, three hundred forty-one".