20303223197 has 2 divisors, whose sum is σ = 20303223198. Its totient is φ = 20303223196.

The previous prime is 20303223191. The next prime is 20303223203. The reversal of 20303223197 is 79132230302.

It is a balanced prime because it is at equal distance from previous prime (20303223191) and next prime (20303223203).

It can be written as a sum of positive squares in only one way, i.e., 13749673081 + 6553550116 = 117259^2 + 80954^2 .

It is a cyclic number.

It is not a de Polignac number, because 20303223197 - 2⁴ = 20303223181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20303223191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151611598 + 10151611599.

It is an arithmetic number, because the mean of its divisors is an integer number (10151611599).

Almost surely, 2^20303223197 is an apocalyptic number.

It is an amenable number.

20303223197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303223197 is an equidigital number, since it uses as much as digits as its factorization.

20303223197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 32.

Adding to 20303223197 its reverse (79132230302), we get a palindrome (99435453499).

The spelling of 20303223197 in words is "twenty billion, three hundred three million, two hundred twenty-three thousand, one hundred ninety-seven".