18327047 has 2 divisors, whose sum is σ = 18327048. Its totient is φ = 18327046.

The previous prime is 18327013. The next prime is 18327053. The reversal of 18327047 is 74072381.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18327047 - 2¹² = 18322951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18327007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9163523 + 9163524.

It is an arithmetic number, because the mean of its divisors is an integer number (9163524).

Almost surely, 2^18327047 is an apocalyptic number.

18327047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18327047 is an equidigital number, since it uses as much as digits as its factorization.

18327047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 18327047 is about 4281.0100443704. The cubic root of 18327047 is about 263.6518549503.

The spelling of 18327047 in words is "eighteen million, three hundred twenty-seven thousand, forty-seven".