18335357549 has 2 divisors, whose sum is σ = 18335357550. Its totient is φ = 18335357548.

The previous prime is 18335357479. The next prime is 18335357581. The reversal of 18335357549 is 94575353381.

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., 11942555524 + 6392802025 = 109282^2 + 79955^2 .

It is a cyclic number.

It is not a de Polignac number, because 18335357549 - 2²⁰ = 18334308973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18335357549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18335350549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167678774 + 9167678775.

It is an arithmetic number, because the mean of its divisors is an integer number (9167678775).

Almost surely, 2^18335357549 is an apocalyptic number.

It is an amenable number.

18335357549 is a deficient number, since it is larger than the sum of its proper divisors (1).

18335357549 is an equidigital number, since it uses as much as digits as its factorization.

18335357549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804000, while the sum is 53.

The spelling of 18335357549 in words is "eighteen billion, three hundred thirty-five million, three hundred fifty-seven thousand, five hundred forty-nine".