20982859 has 16 divisors (see below), whose sum is σ = 22913280. Its totient is φ = 19150560.

The previous prime is 20982833. The next prime is 20982869. The reversal of 20982859 is 95828902.

It is a cyclic number.

It is not a de Polignac number, because 20982859 - 2¹⁵ = 20950091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20982869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67314 + ... + 67624.

It is an arithmetic number, because the mean of its divisors is an integer number (1432080).

Almost surely, 2^20982859 is an apocalyptic number.

20982859 is a deficient number, since it is larger than the sum of its proper divisors (1930421).

20982859 is a wasteful number, since it uses less digits than its factorization.

20982859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 20982859 is about 4580.7050767322. The cubic root of 20982859 is about 275.8173325715.

The spelling of 20982859 in words is "twenty million, nine hundred eighty-two thousand, eight hundred fifty-nine".