21442848 has 96 divisors (see below), whose sum is σ = 68148864. Its totient is φ = 5763072.

The previous prime is 21442819. The next prime is 21442871. The reversal of 21442848 is 84824412.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×21442848² = 919591460702208, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10486 + ... + 12362.

It is an arithmetic number, because the mean of its divisors is an integer number (709884).

Almost surely, 2^21442848 is an apocalyptic number.

21442848 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21442848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34074432).

21442848 is an abundant number, since it is smaller than the sum of its proper divisors (46706016).

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

21442848 is a wasteful number, since it uses less digits than its factorization.

21442848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914 (or 1906 counting only the distinct ones).

The product of its digits is 16384, while the sum is 33.

The square root of 21442848 is about 4630.6422880633. The cubic root of 21442848 is about 277.8182826386.

The spelling of 21442848 in words is "twenty-one million, four hundred forty-two thousand, eight hundred forty-eight".