21082850 has 12 divisors (see below), whose sum is σ = 39214194. Its totient is φ = 8433120.

The previous prime is 21082849. The next prime is 21082861. The reversal of 21082850 is 5828012.

It can be written as a sum of positive squares in 3 ways, for example, as 18671041 + 2411809 = 4321^2 + 1553^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210779 + ... + 210878.

Almost surely, 2^21082850 is an apocalyptic number.

21082850 is a deficient number, since it is larger than the sum of its proper divisors (18131344).

21082850 is a wasteful number, since it uses less digits than its factorization.

21082850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421669 (or 421664 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 21082850 is about 4591.6064726847. The cubic root of 21082850 is about 276.2547619689.

The spelling of 21082850 in words is "twenty-one million, eighty-two thousand, eight hundred fifty".