20010002197 has 2 divisors, whose sum is σ = 20010002198. Its totient is φ = 20010002196.

The previous prime is 20010002189. The next prime is 20010002219. The reversal of 20010002197 is 79120001002.

It is an a-pointer prime, because the next prime (20010002219) can be obtained adding 20010002197 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16851674596 + 3158327601 = 129814^2 + 56199^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010002197 - 2³ = 20010002189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010002107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005001098 + 10005001099.

It is an arithmetic number, because the mean of its divisors is an integer number (10005001099).

Almost surely, 2^20010002197 is an apocalyptic number.

It is an amenable number.

20010002197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010002197 is an equidigital number, since it uses as much as digits as its factorization.

20010002197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 20010002197 its reverse (79120001002), we get a palindrome (99130003199).

The spelling of 20010002197 in words is "twenty billion, ten million, two thousand, one hundred ninety-seven".