21338848 has 48 divisors (see below), whose sum is σ = 44513280. Its totient is φ = 10048896.

The previous prime is 21338833. The next prime is 21338851. The reversal of 21338848 is 84883312.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 57961 + ... + 58327.

It is an arithmetic number, because the mean of its divisors is an integer number (927360).

Almost surely, 2^21338848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21338848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22256640).

21338848 is an abundant number, since it is smaller than the sum of its proper divisors (23174432).

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

21338848 is a wasteful number, since it uses less digits than its factorization.

21338848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 471 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 21338848 is about 4619.3990951205. The cubic root of 21338848 is about 277.3684055333.

The spelling of 21338848 in words is "twenty-one million, three hundred thirty-eight thousand, eight hundred forty-eight".