18603718319 has 2 divisors, whose sum is σ = 18603718320. Its totient is φ = 18603718318.

The previous prime is 18603718277. The next prime is 18603718321. The reversal of 18603718319 is 91381730681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18603718319 - 2²⁸ = 18335282863 is a prime.

It is a super-2 number, since 2×18603718319² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 18603718321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18603718379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9301859159 + 9301859160.

It is an arithmetic number, because the mean of its divisors is an integer number (9301859160).

Almost surely, 2^18603718319 is an apocalyptic number.

18603718319 is a deficient number, since it is larger than the sum of its proper divisors (1).

18603718319 is an equidigital number, since it uses as much as digits as its factorization.

18603718319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 18603718319 in words is "eighteen billion, six hundred three million, seven hundred eighteen thousand, three hundred nineteen".