18342817 has 2 divisors, whose sum is σ = 18342818. Its totient is φ = 18342816.

The previous prime is 18342803. The next prime is 18342851. The reversal of 18342817 is 71824381.

It is a happy number.

It is an a-pointer prime, because the next prime (18342851) can be obtained adding 18342817 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 2692881 = 3956^2 + 1641^2 .

It is a cyclic number.

It is not a de Polignac number, because 18342817 - 2¹¹ = 18340769 is a prime.

It is not a weakly prime, because it can be changed into another prime (18342887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9171408 + 9171409.

It is an arithmetic number, because the mean of its divisors is an integer number (9171409).

Almost surely, 2^18342817 is an apocalyptic number.

It is an amenable number.

18342817 is a deficient number, since it is larger than the sum of its proper divisors (1).

18342817 is an equidigital number, since it uses as much as digits as its factorization.

18342817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 18342817 is about 4282.8515033795. The cubic root of 18342817 is about 263.7274553778.

The spelling of 18342817 in words is "eighteen million, three hundred forty-two thousand, eight hundred seventeen".