21543048 has 36 divisors (see below), whose sum is σ = 58452615. Its totient is φ = 7167888.

The previous prime is 21543031. The next prime is 21543077. The reversal of 21543048 is 84034512.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 10771524 + 10771524 = 3282^2 + 3282^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3282.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39111 + ... + 39657.

Almost surely, 2^21543048 is an apocalyptic number.

It is an amenable number.

21543048 is an abundant number, since it is smaller than the sum of its proper divisors (36909567).

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

21543048 is an equidigital number, since it uses as much as digits as its factorization.

21543048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 21543048 is about 4641.4489117085. The cubic root of 21543048 is about 278.2503481274.

The spelling of 21543048 in words is "twenty-one million, five hundred forty-three thousand, forty-eight".