18289000549 has 2 divisors, whose sum is σ = 18289000550. Its totient is φ = 18289000548.

The previous prime is 18289000531. The next prime is 18289000553. The reversal of 18289000549 is 94500098281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10280540449 + 8008460100 = 101393^2 + 89490^2 .

It is a cyclic number.

It is not a de Polignac number, because 18289000549 - 2¹¹ = 18288998501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18289000499 and 18289000508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18289000589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9144500274 + 9144500275.

It is an arithmetic number, because the mean of its divisors is an integer number (9144500275).

Almost surely, 2^18289000549 is an apocalyptic number.

It is an amenable number.

18289000549 is a deficient number, since it is larger than the sum of its proper divisors (1).

18289000549 is an equidigital number, since it uses as much as digits as its factorization.

18289000549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 18289000549 in words is "eighteen billion, two hundred eighty-nine million, five hundred forty-nine", and thus it is an aban number.