18012193 has 2 divisors, whose sum is σ = 18012194. Its totient is φ = 18012192.

The previous prime is 18012191. The next prime is 18012199. The reversal of 18012193 is 39121081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 7306209 = 3272^2 + 2703^2 .

It is a cyclic number.

It is not a de Polignac number, because 18012193 - 2¹ = 18012191 is a prime.

Together with 18012191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18012191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006096 + 9006097.

It is an arithmetic number, because the mean of its divisors is an integer number (9006097).

Almost surely, 2^18012193 is an apocalyptic number.

It is an amenable number.

18012193 is a deficient number, since it is larger than the sum of its proper divisors (1).

18012193 is an equidigital number, since it uses as much as digits as its factorization.

18012193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 18012193 is about 4244.0774026872. The cubic root of 18012193 is about 262.1333014344.

The spelling of 18012193 in words is "eighteen million, twelve thousand, one hundred ninety-three".