21040848 has 30 divisors (see below), whose sum is σ = 58885554. Its totient is φ = 7013568.

The previous prime is 21040807. The next prime is 21040879. The reversal of 21040848 is 84804012.

21040848 is a `hidden beast` number, since 210 + 408 + 48 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 898704 = 4488^2 + 948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72915 + ... + 73202.

Almost surely, 2^21040848 is an apocalyptic number.

It is an amenable number.

21040848 is an abundant number, since it is smaller than the sum of its proper divisors (37844706).

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

21040848 is a wasteful number, since it uses less digits than its factorization.

21040848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146131 (or 146122 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 21040848 is about 4587.0304119332. The cubic root of 21040848 is about 276.0711851672.

The spelling of 21040848 in words is "twenty-one million, forty thousand, eight hundred forty-eight".