18338287853 has 2 divisors, whose sum is σ = 18338287854. Its totient is φ = 18338287852.

The previous prime is 18338287831. The next prime is 18338287861. The reversal of 18338287853 is 35878283381.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16042248964 + 2296038889 = 126658^2 + 47917^2 .

It is an emirp because it is prime and its reverse (35878283381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18338287853 - 2¹⁶ = 18338222317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18338287153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9169143926 + 9169143927.

It is an arithmetic number, because the mean of its divisors is an integer number (9169143927).

Almost surely, 2^18338287853 is an apocalyptic number.

It is an amenable number.

18338287853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18338287853 is an equidigital number, since it uses as much as digits as its factorization.

18338287853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 56.

The spelling of 18338287853 in words is "eighteen billion, three hundred thirty-eight million, two hundred eighty-seven thousand, eight hundred fifty-three".