21675484 has 12 divisors (see below), whose sum is σ = 37964808. Its totient is φ = 10828400.

The previous prime is 21675473. The next prime is 21675491. The reversal of 21675484 is 48457612.

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, 7299 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (3163734).

Almost surely, 2^21675484 is an apocalyptic number.

It is an amenable number.

21675484 is a deficient number, since it is larger than the sum of its proper divisors (16289324).

21675484 is a wasteful number, since it uses less digits than its factorization.

21675484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676 (or 4674 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 21675484 is about 4655.6937184484. The cubic root of 21675484 is about 278.8193655254.

The spelling of 21675484 in words is "twenty-one million, six hundred seventy-five thousand, four hundred eighty-four".