20053321 has 2 divisors, whose sum is σ = 20053322. Its totient is φ = 20053320.

The previous prime is 20053307. The next prime is 20053331. The reversal of 20053321 is 12335002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 126025 = 4464^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 20053321 - 2⁵ = 20053289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20053295 and 20053304.

It is not a weakly prime, because it can be changed into another prime (20053331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026660 + 10026661.

It is an arithmetic number, because the mean of its divisors is an integer number (10026661).

Almost surely, 2^20053321 is an apocalyptic number.

It is an amenable number.

20053321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20053321 is an equidigital number, since it uses as much as digits as its factorization.

20053321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20053321 is about 4478.0934559252. The cubic root of 20053321 is about 271.6827733727.

Adding to 20053321 its reverse (12335002), we get a palindrome (32388323).

The spelling of 20053321 in words is "twenty million, fifty-three thousand, three hundred twenty-one".