21441104 has 10 divisors (see below), whose sum is σ = 41542170. Its totient is φ = 10720544.

The previous prime is 21441103. The next prime is 21441113. The reversal of 21441104 is 40114412.

It can be written as a sum of positive squares in only one way, i.e., 16810000 + 4631104 = 4100^2 + 2152^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670019 + ... + 670050.

It is an arithmetic number, because the mean of its divisors is an integer number (4154217).

Almost surely, 2^21441104 is an apocalyptic number.

It is an amenable number.

21441104 is a deficient number, since it is larger than the sum of its proper divisors (20101066).

21441104 is a wasteful number, since it uses less digits than its factorization.

21441104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340077 (or 1340071 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 21441104 is about 4630.4539734242. The cubic root of 21441104 is about 277.8107505511.

Adding to 21441104 its reverse (40114412), we get a palindrome (61555516).

The spelling of 21441104 in words is "twenty-one million, four hundred forty-one thousand, one hundred four".