18080202197 has 2 divisors, whose sum is σ = 18080202198. Its totient is φ = 18080202196.

The previous prime is 18080202169. The next prime is 18080202247. The reversal of 18080202197 is 79120208081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10566606436 + 7513595761 = 102794^2 + 86681^2 .

It is a cyclic number.

It is not a de Polignac number, because 18080202197 - 2¹⁶ = 18080136661 is a prime.

It is a super-2 number, since 2×18080202197² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18080202197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18080202697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040101098 + 9040101099.

It is an arithmetic number, because the mean of its divisors is an integer number (9040101099).

Almost surely, 2^18080202197 is an apocalyptic number.

It is an amenable number.

18080202197 is a deficient number, since it is larger than the sum of its proper divisors (1).

18080202197 is an equidigital number, since it uses as much as digits as its factorization.

18080202197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 18080202197 in words is "eighteen billion, eighty million, two hundred two thousand, one hundred ninety-seven".