18493182319 has 2 divisors, whose sum is σ = 18493182320. Its totient is φ = 18493182318.

The previous prime is 18493182313. The next prime is 18493182329. The reversal of 18493182319 is 91328139481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18493182319 - 2³ = 18493182311 is a prime.

It is a super-2 number, since 2×18493182319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18493182311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9246591159 + 9246591160.

It is an arithmetic number, because the mean of its divisors is an integer number (9246591160).

Almost surely, 2^18493182319 is an apocalyptic number.

18493182319 is a deficient number, since it is larger than the sum of its proper divisors (1).

18493182319 is an equidigital number, since it uses as much as digits as its factorization.

18493182319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The spelling of 18493182319 in words is "eighteen billion, four hundred ninety-three million, one hundred eighty-two thousand, three hundred nineteen".