21600048 has 20 divisors (see below), whose sum is σ = 55800248. Its totient is φ = 7200000.

The previous prime is 21600037. The next prime is 21600091. The reversal of 21600048 is 84000612.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21599997 and 21600033.

It is an unprimeable number.

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, 224953 + ... + 225048.

Almost surely, 2^21600048 is an apocalyptic number.

It is an amenable number.

21600048 is an abundant number, since it is smaller than the sum of its proper divisors (34200200).

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

21600048 is a wasteful number, since it uses less digits than its factorization.

21600048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450012 (or 450006 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21600048 is about 4647.5851794238. The cubic root of 21600048 is about 278.4955363095.

The spelling of 21600048 in words is "twenty-one million, six hundred thousand, forty-eight".