21068484 has 12 divisors (see below), whose sum is σ = 49159824. Its totient is φ = 7022824.

The previous prime is 21068477. The next prime is 21068513. The reversal of 21068484 is 48486012.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 877842 + ... + 877865.

It is an arithmetic number, because the mean of its divisors is an integer number (4096652).

Almost surely, 2^21068484 is an apocalyptic number.

It is an amenable number.

21068484 is an abundant number, since it is smaller than the sum of its proper divisors (28091340).

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

21068484 is a wasteful number, since it uses less digits than its factorization.

21068484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755714 (or 1755712 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 21068484 is about 4590.0418298748. The cubic root of 21068484 is about 276.1920004087.

The spelling of 21068484 in words is "twenty-one million, sixty-eight thousand, four hundred eighty-four".