21441338 has 8 divisors (see below), whose sum is σ = 32285088. Its totient is φ = 10679644.

The previous prime is 21441337. The next prime is 21441347. The reversal of 21441338 is 83314412.

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

It is not an unprimeable number, because it can be changed into a prime (21441337) 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 3 ways as a sum of consecutive naturals, for example, 19856 + ... + 20907.

It is an arithmetic number, because the mean of its divisors is an integer number (4035636).

Almost surely, 2^21441338 is an apocalyptic number.

21441338 is a deficient number, since it is larger than the sum of its proper divisors (10843750).

21441338 is a wasteful number, since it uses less digits than its factorization.

21441338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41028.

The product of its digits is 2304, while the sum is 26.

The square root of 21441338 is about 4630.4792408562. The cubic root of 21441338 is about 277.8117611875.

The spelling of 21441338 in words is "twenty-one million, four hundred forty-one thousand, three hundred thirty-eight".