20321233 has 2 divisors, whose sum is σ = 20321234. Its totient is φ = 20321232.

The previous prime is 20321201. The next prime is 20321237. The reversal of 20321233 is 33212302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18766224 + 1555009 = 4332^2 + 1247^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321233 - 2⁵ = 20321201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160616 + 10160617.

It is an arithmetic number, because the mean of its divisors is an integer number (10160617).

Almost surely, 2^20321233 is an apocalyptic number.

It is an amenable number.

20321233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321233 is an equidigital number, since it uses as much as digits as its factorization.

20321233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20321233 is about 4507.9078295813. The cubic root of 20321233 is about 272.8873172513.

Adding to 20321233 its reverse (33212302), we get a palindrome (53533535).

The spelling of 20321233 in words is "twenty million, three hundred twenty-one thousand, two hundred thirty-three".