21076928 has 28 divisors (see below), whose sum is σ = 44028360. Its totient is φ = 9983232.

The previous prime is 21076921. The next prime is 21076933. The reversal of 21076928 is 82967012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21076921) 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, 7451 + ... + 9882.

Almost surely, 2^21076928 is an apocalyptic number.

It is an amenable number.

21076928 is an abundant number, since it is smaller than the sum of its proper divisors (22951432).

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

21076928 is a wasteful number, since it uses less digits than its factorization.

21076928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17364 (or 17354 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 21076928 is about 4590.9615550558. The cubic root of 21076928 is about 276.2288936462.

The spelling of 21076928 in words is "twenty-one million, seventy-six thousand, nine hundred twenty-eight".