20003321197 has 2 divisors, whose sum is σ = 20003321198. Its totient is φ = 20003321196.

The previous prime is 20003321183. The next prime is 20003321209. The reversal of 20003321197 is 79112330002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14637612196 + 5365709001 = 120986^2 + 73251^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003321197 - 2⁷ = 20003321069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003321147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001660598 + 10001660599.

It is an arithmetic number, because the mean of its divisors is an integer number (10001660599).

Almost surely, 2^20003321197 is an apocalyptic number.

It is an amenable number.

20003321197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003321197 is an equidigital number, since it uses as much as digits as its factorization.

20003321197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

Adding to 20003321197 its reverse (79112330002), we get a palindrome (99115651199).

The spelling of 20003321197 in words is "twenty billion, three million, three hundred twenty-one thousand, one hundred ninety-seven".