20441321 has 4 divisors (see below), whose sum is σ = 21517200. Its totient is φ = 19365444.

The previous prime is 20441269. The next prime is 20441347. The reversal of 20441321 is 12314402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12314402 = 2 ⋅6157201.

It is a cyclic number.

It is not a de Polignac number, because 20441321 - 2⁶ = 20441257 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 20441321.

It is not an unprimeable number, because it can be changed into a prime (20441921) 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, 537911 + ... + 537948.

It is an arithmetic number, because the mean of its divisors is an integer number (5379300).

Almost surely, 2^20441321 is an apocalyptic number.

It is an amenable number.

20441321 is a deficient number, since it is larger than the sum of its proper divisors (1075879).

20441321 is a wasteful number, since it uses less digits than its factorization.

20441321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075878.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20441321 is about 4521.2079138213. The cubic root of 20441321 is about 273.4238029231.

Adding to 20441321 its reverse (12314402), we get a palindrome (32755723).

The spelling of 20441321 in words is "twenty million, four hundred forty-one thousand, three hundred twenty-one".