21886848 has 80 divisors (see below), whose sum is σ = 65165760. Its totient is φ = 7292160.

The previous prime is 21886847. The next prime is 21886859. The reversal of 21886848 is 84868812.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21886847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9313 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (814572).

Almost surely, 2^21886848 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 21886848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32582880).

21886848 is an abundant number, since it is smaller than the sum of its proper divisors (43278912).

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

21886848 is an equidigital number, since it uses as much as digits as its factorization.

21886848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137 (or 2116 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 21886848 is about 4678.3381664860. The cubic root of 21886848 is about 279.7227186989.

The spelling of 21886848 in words is "twenty-one million, eight hundred eighty-six thousand, eight hundred forty-eight".