18041324849 has 2 divisors, whose sum is σ = 18041324850. Its totient is φ = 18041324848.

The previous prime is 18041324839. The next prime is 18041324863. The reversal of 18041324849 is 94842314081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12051648400 + 5989676449 = 109780^2 + 77393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18041324849 is a prime.

It is not a weakly prime, because it can be changed into another prime (18041324839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020662424 + 9020662425.

It is an arithmetic number, because the mean of its divisors is an integer number (9020662425).

Almost surely, 2^18041324849 is an apocalyptic number.

It is an amenable number.

18041324849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18041324849 is an equidigital number, since it uses as much as digits as its factorization.

18041324849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 18041324849 in words is "eighteen billion, forty-one million, three hundred twenty-four thousand, eight hundred forty-nine".