21884704 has 24 divisors (see below), whose sum is σ = 44005248. Its totient is φ = 10708800.

The previous prime is 21884699. The next prime is 21884741. The reversal of 21884704 is 40748812.

It is a self number, because there is not a number n which added to its sum of digits gives 21884704.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5772 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (1833552).

Almost surely, 2^21884704 is an apocalyptic number.

It is an amenable number.

21884704 is an abundant number, since it is smaller than the sum of its proper divisors (22120544).

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

21884704 is a wasteful number, since it uses less digits than its factorization.

21884704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608 (or 14600 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 21884704 is about 4678.1090196788. The cubic root of 21884704 is about 279.7135846733.

The spelling of 21884704 in words is "twenty-one million, eight hundred eighty-four thousand, seven hundred four".