21441004 has 36 divisors (see below), whose sum is σ = 41555136. Its totient is φ = 9622368.

The previous prime is 21441001. The next prime is 21441011. The reversal of 21441004 is 40014412.

It is not an unprimeable number, because it can be changed into a prime (21441001) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 96037 + ... + 96259.

Almost surely, 2^21441004 is an apocalyptic number.

It is an amenable number.

21441004 is a deficient number, since it is larger than the sum of its proper divisors (20114132).

21441004 is a wasteful number, since it uses less digits than its factorization.

21441004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 21441004 is about 4630.4431753343. The cubic root of 21441004 is about 277.8103186530.

Adding to 21441004 its reverse (40014412), we get a palindrome (61455416).

The spelling of 21441004 in words is "twenty-one million, four hundred forty-one thousand, four".