21410444 has 12 divisors (see below), whose sum is σ = 40874568. Its totient is φ = 9732000.

The previous prime is 21410437. The next prime is 21410471. The reversal of 21410444 is 44401412.

It is a happy number.

It is a super-2 number, since 2×21410444² = 916814224554272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243257 + ... + 243344.

It is an arithmetic number, because the mean of its divisors is an integer number (3406214).

Almost surely, 2^21410444 is an apocalyptic number.

It is an amenable number.

21410444 is a deficient number, since it is larger than the sum of its proper divisors (19464124).

21410444 is a wasteful number, since it uses less digits than its factorization.

21410444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486616 (or 486614 counting only the distinct ones).

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

The square root of 21410444 is about 4627.1420985312. The cubic root of 21410444 is about 277.6782676213.

Adding to 21410444 its reverse (44401412), we get a palindrome (65811856).

The spelling of 21410444 in words is "twenty-one million, four hundred ten thousand, four hundred forty-four".