21048584 has 16 divisors (see below), whose sum is σ = 41787900. Its totient is φ = 9905152.

The previous prime is 21048571. The next prime is 21048593. The reversal of 21048584 is 48584012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18232900 + 2815684 = 4270^2 + 1678^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21048584.

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, 77249 + ... + 77520.

Almost surely, 2^21048584 is an apocalyptic number.

It is an amenable number.

21048584 is a deficient number, since it is larger than the sum of its proper divisors (20739316).

21048584 is a wasteful number, since it uses less digits than its factorization.

21048584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154792 (or 154788 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 21048584 is about 4587.8735815190. The cubic root of 21048584 is about 276.1050149983.

The spelling of 21048584 in words is "twenty-one million, forty-eight thousand, five hundred eighty-four".