21844414 has 16 divisors (see below), whose sum is σ = 34635600. Its totient is φ = 10304064.

The previous prime is 21844409. The next prime is 21844441. The reversal of 21844414 is 41444812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9154 + ... + 11290.

It is an arithmetic number, because the mean of its divisors is an integer number (2164725).

Almost surely, 2^21844414 is an apocalyptic number.

21844414 is a deficient number, since it is larger than the sum of its proper divisors (12791186).

21844414 is a wasteful number, since it uses less digits than its factorization.

21844414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427.

The product of its digits is 4096, while the sum is 28.

The square root of 21844414 is about 4673.8008087637. The cubic root of 21844414 is about 279.5418272170.

The spelling of 21844414 in words is "twenty-one million, eight hundred forty-four thousand, four hundred fourteen".