21441003 has 4 divisors (see below), whose sum is σ = 28588008. Its totient is φ = 14294000.

The previous prime is 21441001. The next prime is 21441011. The reversal of 21441003 is 30014412.

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

It is a cyclic number.

It is not a de Polignac number, because 21441003 - 2¹ = 21441001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21441001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3573498 + ... + 3573503.

It is an arithmetic number, because the mean of its divisors is an integer number (7147002).

Almost surely, 2^21441003 is an apocalyptic number.

21441003 is a deficient number, since it is larger than the sum of its proper divisors (7147005).

21441003 is an equidigital number, since it uses as much as digits as its factorization.

21441003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147004.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21441003 is about 4630.4430673533. The cubic root of 21441003 is about 277.8103143340.

Adding to 21441003 its reverse (30014412), we get a palindrome (51455415).

The spelling of 21441003 in words is "twenty-one million, four hundred forty-one thousand, three".