18197774347 has 2 divisors, whose sum is σ = 18197774348. Its totient is φ = 18197774346.

The previous prime is 18197774341. The next prime is 18197774359. The reversal of 18197774347 is 74347779181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18197774347 - 2¹⁹ = 18197250059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18197774291 and 18197774300.

It is not a weakly prime, because it can be changed into another prime (18197774341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098887173 + 9098887174.

It is an arithmetic number, because the mean of its divisors is an integer number (9098887174).

Almost surely, 2^18197774347 is an apocalyptic number.

18197774347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18197774347 is an equidigital number, since it uses as much as digits as its factorization.

18197774347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8297856, while the sum is 58.

The spelling of 18197774347 in words is "eighteen billion, one hundred ninety-seven million, seven hundred seventy-four thousand, three hundred forty-seven".