18000893 has 2 divisors, whose sum is σ = 18000894. Its totient is φ = 18000892.

The previous prime is 18000889. The next prime is 18000901. The reversal of 18000893 is 39800081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14455204 + 3545689 = 3802^2 + 1883^2 .

It is an emirp because it is prime and its reverse (39800081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18000893 - 2² = 18000889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18000803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000446 + 9000447.

It is an arithmetic number, because the mean of its divisors is an integer number (9000447).

Almost surely, 2^18000893 is an apocalyptic number.

It is an amenable number.

18000893 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000893 is an equidigital number, since it uses as much as digits as its factorization.

18000893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18000893 is about 4242.7459268733. The cubic root of 18000893 is about 262.0784732790.

The spelling of 18000893 in words is "eighteen million, eight hundred ninety-three", and thus it is an aban number.