18419369 has 2 divisors, whose sum is σ = 18419370. Its totient is φ = 18419368.

The previous prime is 18419329. The next prime is 18419371. The reversal of 18419369 is 96391481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13601344 + 4818025 = 3688^2 + 2195^2 .

It is a cyclic number.

It is not a de Polignac number, because 18419369 - 2²⁴ = 1642153 is a prime.

It is a super-2 number, since 2×18419369² = 678546308716322, which contains 22 as substring.

Together with 18419371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18419309) 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, 9209684 + 9209685.

It is an arithmetic number, because the mean of its divisors is an integer number (9209685).

Almost surely, 2^18419369 is an apocalyptic number.

It is an amenable number.

18419369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18419369 is an equidigital number, since it uses as much as digits as its factorization.

18419369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 18419369 is about 4291.7792347697. The cubic root of 18419369 is about 264.0938266512.

The spelling of 18419369 in words is "eighteen million, four hundred nineteen thousand, three hundred sixty-nine".