21838848 has 44 divisors (see below), whose sum is σ = 58216680. Its totient is φ = 7278592.

The previous prime is 21838837. The next prime is 21838853. The reversal of 21838848 is 84883812.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483 + ... + 6626.

Almost surely, 2^21838848 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 21838848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29108340).

21838848 is an abundant number, since it is smaller than the sum of its proper divisors (36377832).

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

21838848 is an equidigital number, since it uses as much as digits as its factorization.

21838848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132 (or 7114 counting only the distinct ones).

The product of its digits is 98304, while the sum is 42.

The square root of 21838848 is about 4673.2053239720. The cubic root of 21838848 is about 279.5180825963.

The spelling of 21838848 in words is "twenty-one million, eight hundred thirty-eight thousand, eight hundred forty-eight".