18814673 has 2 divisors, whose sum is σ = 18814674. Its totient is φ = 18814672.

The previous prime is 18814661. The next prime is 18814681. The reversal of 18814673 is 37641881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18464209 + 350464 = 4297^2 + 592^2 .

It is an emirp because it is prime and its reverse (37641881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18814673 - 2¹⁴ = 18798289 is a prime.

It is not a weakly prime, because it can be changed into another prime (18814633) 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, 9407336 + 9407337.

It is an arithmetic number, because the mean of its divisors is an integer number (9407337).

Almost surely, 2^18814673 is an apocalyptic number.

It is an amenable number.

18814673 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814673 is an equidigital number, since it uses as much as digits as its factorization.

18814673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 18814673 is about 4337.5883852666. The cubic root of 18814673 is about 265.9697376393.

The spelling of 18814673 in words is "eighteen million, eight hundred fourteen thousand, six hundred seventy-three".