21296084 has 24 divisors (see below), whose sum is σ = 38099040. Its totient is φ = 10413216.

The previous prime is 21296083. The next prime is 21296111. The reversal of 21296084 is 48069212.

It is a self number, because there is not a number n which added to its sum of digits gives 21296084.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21296083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61199 + ... + 61545.

It is an arithmetic number, because the mean of its divisors is an integer number (1587460).

Almost surely, 2^21296084 is an apocalyptic number.

It is an amenable number.

21296084 is a deficient number, since it is larger than the sum of its proper divisors (16802956).

21296084 is a wasteful number, since it uses less digits than its factorization.

21296084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 21296084 is about 4614.7680331735. The cubic root of 21296084 is about 277.1829954164.

The spelling of 21296084 in words is "twenty-one million, two hundred ninety-six thousand, eighty-four".