20985282 has 12 divisors (see below), whose sum is σ = 45468150. Its totient is φ = 6995088.

The previous prime is 20985229. The next prime is 20985287. The reversal of 20985282 is 28258902.

It can be written as a sum of positive squares in only one way, i.e., 19105641 + 1879641 = 4371^2 + 1371^2 .

It is not an unprimeable number, because it can be changed into a prime (20985287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 582907 + ... + 582942.

Almost surely, 2^20985282 is an apocalyptic number.

20985282 is an abundant number, since it is smaller than the sum of its proper divisors (24482868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20985282 is a wasteful number, since it uses less digits than its factorization.

20985282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165857 (or 1165854 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 20985282 is about 4580.9695480324. The cubic root of 20985282 is about 275.8279488508.

It can be divided in two parts, 209 and 85282, that added together give a triangular number (85491 = T₄₁₃).

The spelling of 20985282 in words is "twenty million, nine hundred eighty-five thousand, two hundred eighty-two".