21444848 has 20 divisors (see below), whose sum is σ = 42255480. Its totient is φ = 10540224.

The previous prime is 21444811. The next prime is 21444853. The reversal of 21444848 is 84844412.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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

21444848 is a modest number, since divided by 4848 gives 2144 as remainder.

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, 10415 + ... + 12302.

It is an arithmetic number, because the mean of its divisors is an integer number (2112774).

Almost surely, 2^21444848 is an apocalyptic number.

It is an amenable number.

21444848 is a deficient number, since it is larger than the sum of its proper divisors (20810632).

21444848 is a wasteful number, since it uses less digits than its factorization.

21444848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22784 (or 22778 counting only the distinct ones).

The product of its digits is 32768, while the sum is 35.

The square root of 21444848 is about 4630.8582357917. The cubic root of 21444848 is about 277.8269198509.

The spelling of 21444848 in words is "twenty-one million, four hundred forty-four thousand, eight hundred forty-eight".