20414321 has 4 divisors (see below), whose sum is σ = 20749044. Its totient is φ = 20079600.

The previous prime is 20414287. The next prime is 20414327. The reversal of 20414321 is 12341402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 15124321 = 2300^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 20414321 - 2⁶ = 20414257 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 20414321.

It is not an unprimeable number, because it can be changed into a prime (20414327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167270 + ... + 167391.

It is an arithmetic number, because the mean of its divisors is an integer number (5187261).

Almost surely, 2^20414321 is an apocalyptic number.

It is an amenable number.

20414321 is a deficient number, since it is larger than the sum of its proper divisors (334723).

20414321 is an equidigital number, since it uses as much as digits as its factorization.

20414321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334722.

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

The square root of 20414321 is about 4518.2209994643. The cubic root of 20414321 is about 273.3033655756.

Adding to 20414321 its reverse (12341402), we get a palindrome (32755723).

The spelling of 20414321 in words is "twenty million, four hundred fourteen thousand, three hundred twenty-one".