21884313 has 8 divisors (see below), whose sum is σ = 31831776. Its totient is φ = 13263200.

The previous prime is 21884311. The next prime is 21884323. The reversal of 21884313 is 31348812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21884313 - 2¹ = 21884311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21884311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331548 + ... + 331613.

It is an arithmetic number, because the mean of its divisors is an integer number (3978972).

Almost surely, 2^21884313 is an apocalyptic number.

It is an amenable number.

21884313 is a deficient number, since it is larger than the sum of its proper divisors (9947463).

21884313 is a wasteful number, since it uses less digits than its factorization.

21884313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663175.

The product of its digits is 4608, while the sum is 30.

The square root of 21884313 is about 4678.0672291022. The cubic root of 21884313 is about 279.7119188422.

The spelling of 21884313 in words is "twenty-one million, eight hundred eighty-four thousand, three hundred thirteen".