21327041 has 8 divisors (see below), whose sum is σ = 21810600. Its totient is φ = 20846592.

The previous prime is 21327013. The next prime is 21327043. The reversal of 21327041 is 14072312.

It can be written as a sum of positive squares in 4 ways, for example, as 10627600 + 10699441 = 3260^2 + 3271^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21327041 - 2¹⁰ = 21326017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21327043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17921 + ... + 19073.

It is an arithmetic number, because the mean of its divisors is an integer number (2726325).

Almost surely, 2^21327041 is an apocalyptic number.

It is an amenable number.

21327041 is a deficient number, since it is larger than the sum of its proper divisors (483559).

21327041 is a wasteful number, since it uses less digits than its factorization.

21327041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 21327041 is about 4618.1209382172. The cubic root of 21327041 is about 277.3172391823.

Adding to 21327041 its reverse (14072312), we get a palindrome (35399353).

The spelling of 21327041 in words is "twenty-one million, three hundred twenty-seven thousand, forty-one".