21208848 has 40 divisors (see below), whose sum is σ = 55725600. Its totient is φ = 6948864.

The previous prime is 21208841. The next prime is 21208871. The reversal of 21208848 is 84880212.

It is not an unprimeable number, because it can be changed into a prime (21208841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 913 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (1393140).

Almost surely, 2^21208848 is an apocalyptic number.

It is an amenable number.

21208848 is an abundant number, since it is smaller than the sum of its proper divisors (34516752).

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

21208848 is a wasteful number, since it uses less digits than its factorization.

21208848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7559 (or 7553 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 21208848 is about 4605.3065044577. The cubic root of 21208848 is about 276.8039988508.

The spelling of 21208848 in words is "twenty-one million, two hundred eight thousand, eight hundred forty-eight".