21112048 has 20 divisors (see below), whose sum is σ = 41903568. Its totient is φ = 10298240.

The previous prime is 21112043. The next prime is 21112061. The reversal of 21112048 is 84021112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15436 + ... + 16747.

Almost surely, 2^21112048 is an apocalyptic number.

It is an amenable number.

21112048 is a deficient number, since it is larger than the sum of its proper divisors (20791520).

21112048 is a wasteful number, since it uses less digits than its factorization.

21112048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32232 (or 32226 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 21112048 is about 4594.7848698280. The cubic root of 21112048 is about 276.3822331249.

The spelling of 21112048 in words is "twenty-one million, one hundred twelve thousand, forty-eight".