20050321 has 2 divisors, whose sum is σ = 20050322. Its totient is φ = 20050320.

The previous prime is 20050307. The next prime is 20050343. The reversal of 20050321 is 12305002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15492096 + 4558225 = 3936^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 20050321 - 2¹⁹ = 19526033 is a prime.

It is not a weakly prime, because it can be changed into another prime (20050351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025160 + 10025161.

It is an arithmetic number, because the mean of its divisors is an integer number (10025161).

Almost surely, 2^20050321 is an apocalyptic number.

It is an amenable number.

20050321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20050321 is an equidigital number, since it uses as much as digits as its factorization.

20050321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20050321 is about 4477.7584794180. The cubic root of 20050321 is about 271.6692246781.

Adding to 20050321 its reverse (12305002), we get a palindrome (32355323).

The spelling of 20050321 in words is "twenty million, fifty thousand, three hundred twenty-one".