18006347 has 2 divisors, whose sum is σ = 18006348. Its totient is φ = 18006346.

The previous prime is 18006337. The next prime is 18006353. The reversal of 18006347 is 74360081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18006347 - 2⁶ = 18006283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18006337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9003173 + 9003174.

It is an arithmetic number, because the mean of its divisors is an integer number (9003174).

Almost surely, 2^18006347 is an apocalyptic number.

18006347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18006347 is an equidigital number, since it uses as much as digits as its factorization.

18006347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 18006347 is about 4243.3886223159. The cubic root of 18006347 is about 262.1049392189.

The spelling of 18006347 in words is "eighteen million, six thousand, three hundred forty-seven".