21096448 has 24 divisors (see below), whose sum is σ = 42186690. Its totient is φ = 10547200.

The previous prime is 21096437. The next prime is 21096457. The reversal of 21096448 is 84469012.

It can be written as a sum of positive squares in only one way, i.e., 12616704 + 8479744 = 3552^2 + 2912^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3103 + ... + 7198.

Almost surely, 2^21096448 is an apocalyptic number.

It is an amenable number.

21096448 is a deficient number, since it is larger than the sum of its proper divisors (21090242).

21096448 is an equidigital number, since it uses as much as digits as its factorization.

21096448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323 (or 10303 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 21096448 is about 4593.0869793637. The cubic root of 21096448 is about 276.3141420641.

The spelling of 21096448 in words is "twenty-one million, ninety-six thousand, four hundred forty-eight".