20982766 has 16 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 8953560.

The previous prime is 20982763. The next prime is 20982779. The reversal of 20982766 is 66728902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20982761) 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, 211 + ... + 6481.

It is an arithmetic number, because the mean of its divisors is an integer number (2257920).

Almost surely, 2^20982766 is an apocalyptic number.

20982766 is a deficient number, since it is larger than the sum of its proper divisors (15143954).

20982766 is a wasteful number, since it uses less digits than its factorization.

20982766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6519.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 20982766 is about 4580.6949254453. The cubic root of 20982766 is about 275.8169250794.

The spelling of 20982766 in words is "twenty million, nine hundred eighty-two thousand, seven hundred sixty-six".