21441133 has 8 divisors (see below), whose sum is σ = 25074368. Its totient is φ = 17950464.

The previous prime is 21441113. The next prime is 21441137. The reversal of 21441133 is 33114412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21441133 - 2²¹ = 19343981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21441133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441137) 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 7 ways as a sum of consecutive naturals, for example, 35316 + ... + 35917.

It is an arithmetic number, because the mean of its divisors is an integer number (3134296).

Almost surely, 2^21441133 is an apocalyptic number.

It is an amenable number.

21441133 is a deficient number, since it is larger than the sum of its proper divisors (3633235).

21441133 is an equidigital number, since it uses as much as digits as its factorization.

21441133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71283.

The product of its digits is 288, while the sum is 19.

The square root of 21441133 is about 4630.4571048656. The cubic root of 21441133 is about 277.8108758013.

Adding to 21441133 its reverse (33114412), we get a palindrome (54555545).

The spelling of 21441133 in words is "twenty-one million, four hundred forty-one thousand, one hundred thirty-three".