21044326 has 4 divisors (see below), whose sum is σ = 31566492. Its totient is φ = 10522162.

The previous prime is 21044311. The next prime is 21044341. The reversal of 21044326 is 62344012.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (21044311) and next prime (21044341).

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 21044297 and 21044306.

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, 5261080 + ... + 5261083.

It is an arithmetic number, because the mean of its divisors is an integer number (7891623).

Almost surely, 2^21044326 is an apocalyptic number.

21044326 is a deficient number, since it is larger than the sum of its proper divisors (10522166).

21044326 is a wasteful number, since it uses less digits than its factorization.

21044326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522165.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21044326 is about 4587.4095086443. The cubic root of 21044326 is about 276.0863956233.

Adding to 21044326 its reverse (62344012), we get a palindrome (83388338).

The spelling of 21044326 in words is "twenty-one million, forty-four thousand, three hundred twenty-six".