18197774359 has 2 divisors, whose sum is σ = 18197774360. Its totient is φ = 18197774358.

The previous prime is 18197774347. The next prime is 18197774393. The reversal of 18197774359 is 95347779181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18197774359 - 2¹⁷ = 18197643287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18197774297 and 18197774306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18194774359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098887179 + 9098887180.

It is an arithmetic number, because the mean of its divisors is an integer number (9098887180).

Almost surely, 2^18197774359 is an apocalyptic number.

18197774359 is a deficient number, since it is larger than the sum of its proper divisors (1).

18197774359 is an equidigital number, since it uses as much as digits as its factorization.

18197774359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13335840, while the sum is 61.

The spelling of 18197774359 in words is "eighteen billion, one hundred ninety-seven million, seven hundred seventy-four thousand, three hundred fifty-nine".