18197774341 has 2 divisors, whose sum is σ = 18197774342. Its totient is φ = 18197774340.

The previous prime is 18197774323. The next prime is 18197774347. The reversal of 18197774341 is 14347779181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12399713316 + 5798061025 = 111354^2 + 76145^2 .

It is a cyclic number.

It is not a de Polignac number, because 18197774341 - 2¹³ = 18197766149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18197774347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098887170 + 9098887171.

It is an arithmetic number, because the mean of its divisors is an integer number (9098887171).

Almost surely, 2^18197774341 is an apocalyptic number.

It is an amenable number.

18197774341 is a deficient number, since it is larger than the sum of its proper divisors (1).

18197774341 is an equidigital number, since it uses as much as digits as its factorization.

18197774341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 52.

The spelling of 18197774341 in words is "eighteen billion, one hundred ninety-seven million, seven hundred seventy-four thousand, three hundred forty-one".