18342691 has 2 divisors, whose sum is σ = 18342692. Its totient is φ = 18342690.

The previous prime is 18342683. The next prime is 18342743. The reversal of 18342691 is 19624381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18342691 - 2³ = 18342683 is a prime.

It is not a weakly prime, because it can be changed into another prime (18342601) 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, 9171345 + 9171346.

It is an arithmetic number, because the mean of its divisors is an integer number (9171346).

Almost surely, 2^18342691 is an apocalyptic number.

18342691 is a deficient number, since it is larger than the sum of its proper divisors (1).

18342691 is an equidigital number, since it uses as much as digits as its factorization.

18342691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 18342691 is about 4282.8367935283. The cubic root of 18342691 is about 263.7268515132.

The spelling of 18342691 in words is "eighteen million, three hundred forty-two thousand, six hundred ninety-one".