18213116347 has 2 divisors, whose sum is σ = 18213116348. Its totient is φ = 18213116346.

The previous prime is 18213116323. The next prime is 18213116353. The reversal of 18213116347 is 74361131281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18213116347 - 2⁷ = 18213116219 is a prime.

It is not a weakly prime, because it can be changed into another prime (18213176347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9106558173 + 9106558174.

It is an arithmetic number, because the mean of its divisors is an integer number (9106558174).

Almost surely, 2^18213116347 is an apocalyptic number.

18213116347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18213116347 is an equidigital number, since it uses as much as digits as its factorization.

18213116347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The spelling of 18213116347 in words is "eighteen billion, two hundred thirteen million, one hundred sixteen thousand, three hundred forty-seven".