20982663 has 36 divisors (see below), whose sum is σ = 33801768. Its totient is φ = 12467520.

The previous prime is 20982659. The next prime is 20982677. The reversal of 20982663 is 36628902.

It is not a de Polignac number, because 20982663 - 2² = 20982659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20982613) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 160108 + ... + 160238.

It is an arithmetic number, because the mean of its divisors is an integer number (938938).

Almost surely, 2^20982663 is an apocalyptic number.

20982663 is a deficient number, since it is larger than the sum of its proper divisors (12819105).

20982663 is a wasteful number, since it uses less digits than its factorization.

20982663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 20982663 is about 4580.6836825959. The cubic root of 20982663 is about 275.8164737695.

It can be divided in two parts, 2098 and 2663, that added together give a square (4761 = 69²).

The spelling of 20982663 in words is "twenty million, nine hundred eighty-two thousand, six hundred sixty-three".