21441044 has 24 divisors (see below), whose sum is σ = 40249440. Its totient is φ = 9962784.

The previous prime is 21441031. The next prime is 21441089. The reversal of 21441044 is 44014412.

It is a happy number.

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, 1367 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (1677060).

Almost surely, 2^21441044 is an apocalyptic number.

It is an amenable number.

21441044 is a deficient number, since it is larger than the sum of its proper divisors (18808396).

21441044 is a wasteful number, since it uses less digits than its factorization.

21441044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399 (or 5397 counting only the distinct ones).

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

The square root of 21441044 is about 4630.4474945733. The cubic root of 21441044 is about 277.8104914124.

Adding to 21441044 its reverse (44014412), we get a palindrome (65455456).

The spelling of 21441044 in words is "twenty-one million, four hundred forty-one thousand, forty-four".