20321232193 has 2 divisors, whose sum is σ = 20321232194. Its totient is φ = 20321232192.

The previous prime is 20321232187. The next prime is 20321232229. The reversal of 20321232193 is 39123212302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12089662209 + 8231569984 = 109953^2 + 90728^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321232193 - 2⁵ = 20321232161 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321232143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160616096 + 10160616097.

It is an arithmetic number, because the mean of its divisors is an integer number (10160616097).

Almost surely, 2^20321232193 is an apocalyptic number.

It is an amenable number.

20321232193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321232193 is an equidigital number, since it uses as much as digits as its factorization.

20321232193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 20321232193 its reverse (39123212302), we get a palindrome (59444444495).

The spelling of 20321232193 in words is "twenty billion, three hundred twenty-one million, two hundred thirty-two thousand, one hundred ninety-three".