18347350694399 has 2 divisors, whose sum is σ = 18347350694400. Its totient is φ = 18347350694398.

The previous prime is 18347350694371. The next prime is 18347350694459. The reversal of 18347350694399 is 99349605374381.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18347350694399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18347350690399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9173675347199 + 9173675347200.

It is an arithmetic number, because the mean of its divisors is an integer number (9173675347200).

Almost surely, 2^{18347350694399} is an apocalyptic number.

18347350694399 is a deficient number, since it is larger than the sum of its proper divisors (1).

18347350694399 is an equidigital number, since it uses as much as digits as its factorization.

18347350694399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529079040, while the sum is 71.

The spelling of 18347350694399 in words is "eighteen trillion, three hundred forty-seven billion, three hundred fifty million, six hundred ninety-four thousand, three hundred ninety-nine".