18466873 has 2 divisors, whose sum is σ = 18466874. Its totient is φ = 18466872.

The previous prime is 18466867. The next prime is 18466891. The reversal of 18466873 is 37866481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10582009 + 7884864 = 3253^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 18466873 - 2⁹ = 18466361 is a prime.

It is not a weakly prime, because it can be changed into another prime (18466373) 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, 9233436 + 9233437.

It is an arithmetic number, because the mean of its divisors is an integer number (9233437).

Almost surely, 2^18466873 is an apocalyptic number.

It is an amenable number.

18466873 is a deficient number, since it is larger than the sum of its proper divisors (1).

18466873 is an equidigital number, since it uses as much as digits as its factorization.

18466873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 18466873 is about 4297.3099725293. The cubic root of 18466873 is about 264.3206665519.

The spelling of 18466873 in words is "eighteen million, four hundred sixty-six thousand, eight hundred seventy-three".