18897599207 has 2 divisors, whose sum is σ = 18897599208. Its totient is φ = 18897599206.

The previous prime is 18897599167. The next prime is 18897599221. The reversal of 18897599207 is 70299579881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18897599207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18897599407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9448799603 + 9448799604.

It is an arithmetic number, because the mean of its divisors is an integer number (9448799604).

Almost surely, 2^18897599207 is an apocalyptic number.

18897599207 is a deficient number, since it is larger than the sum of its proper divisors (1).

18897599207 is an equidigital number, since it uses as much as digits as its factorization.

18897599207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 65.

The spelling of 18897599207 in words is "eighteen billion, eight hundred ninety-seven million, five hundred ninety-nine thousand, two hundred seven".