21883456 has 28 divisors (see below), whose sum is σ = 49629568. Its totient is φ = 9378432.

The previous prime is 21883453. The next prime is 21883457. The reversal of 21883456 is 65438812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (21883451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23976 + ... + 24871.

Almost surely, 2^21883456 is an apocalyptic number.

It is an amenable number.

21883456 is an abundant number, since it is smaller than the sum of its proper divisors (27746112).

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

21883456 is an equidigital number, since it uses as much as digits as its factorization.

21883456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48866 (or 48856 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 21883456 is about 4677.9756305479. The cubic root of 21883456 is about 279.7082675777.

The spelling of 21883456 in words is "twenty-one million, eight hundred eighty-three thousand, four hundred fifty-six".