18004369 has 2 divisors, whose sum is σ = 18004370. Its totient is φ = 18004368.

The previous prime is 18004367. The next prime is 18004373. The reversal of 18004369 is 96340081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17766225 + 238144 = 4215^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 18004369 - 2¹ = 18004367 is a prime.

It is a super-2 number, since 2×18004369² = 648314606176322, which contains 22 as substring.

Together with 18004367, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18004369.

It is not a weakly prime, because it can be changed into another prime (18004367) 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, 9002184 + 9002185.

It is an arithmetic number, because the mean of its divisors is an integer number (9002185).

Almost surely, 2^18004369 is an apocalyptic number.

It is an amenable number.

18004369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18004369 is an equidigital number, since it uses as much as digits as its factorization.

18004369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 18004369 is about 4243.1555474670. The cubic root of 18004369 is about 262.0953414448.

The spelling of 18004369 in words is "eighteen million, four thousand, three hundred sixty-nine".