21044414 has 4 divisors (see below), whose sum is σ = 31566624. Its totient is φ = 10522206.

The previous prime is 21044407. The next prime is 21044423. The reversal of 21044414 is 41444012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5261102 + ... + 5261105.

It is an arithmetic number, because the mean of its divisors is an integer number (7891656).

Almost surely, 2^21044414 is an apocalyptic number.

21044414 is a deficient number, since it is larger than the sum of its proper divisors (10522210).

21044414 is a wasteful number, since it uses less digits than its factorization.

21044414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522209.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 21044414 is about 4587.4191001041. The cubic root of 21044414 is about 276.0867804549.

Adding to 21044414 its reverse (41444012), we get a palindrome (62488426).

The spelling of 21044414 in words is "twenty-one million, forty-four thousand, four hundred fourteen".