18694427 has 2 divisors, whose sum is σ = 18694428. Its totient is φ = 18694426.

The previous prime is 18694421. The next prime is 18694433. The reversal of 18694427 is 72449681.

It is a balanced prime because it is at equal distance from previous prime (18694421) and next prime (18694433).

It is a cyclic number.

It is not a de Polignac number, because 18694427 - 2⁴ = 18694411 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18694421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9347213 + 9347214.

It is an arithmetic number, because the mean of its divisors is an integer number (9347214).

Almost surely, 2^18694427 is an apocalyptic number.

18694427 is a deficient number, since it is larger than the sum of its proper divisors (1).

18694427 is an equidigital number, since it uses as much as digits as its factorization.

18694427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 18694427 is about 4323.7052397221. The cubic root of 18694427 is about 265.4019153388.

The spelling of 18694427 in words is "eighteen million, six hundred ninety-four thousand, four hundred twenty-seven".