21327341 has 4 divisors (see below), whose sum is σ = 24374112. Its totient is φ = 18280572.

The previous prime is 21327307. The next prime is 21327343. The reversal of 21327341 is 14372312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21327341 - 2¹⁴ = 21310957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327343) 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, 1523375 + ... + 1523388.

It is an arithmetic number, because the mean of its divisors is an integer number (6093528).

Almost surely, 2^21327341 is an apocalyptic number.

It is an amenable number.

21327341 is a deficient number, since it is larger than the sum of its proper divisors (3046771).

21327341 is an equidigital number, since it uses as much as digits as its factorization.

21327341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046770.

The product of its digits is 1008, while the sum is 23.

The square root of 21327341 is about 4618.1534188461. The cubic root of 21327341 is about 277.3185394843.

Adding to 21327341 its reverse (14372312), we get a palindrome (35699653).

The spelling of 21327341 in words is "twenty-one million, three hundred twenty-seven thousand, three hundred forty-one".