18449898405073 has 2 divisors, whose sum is σ = 18449898405074. Its totient is φ = 18449898405072.

The previous prime is 18449898405049. The next prime is 18449898405163. The reversal of 18449898405073 is 37050489894481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18432356197264 + 17542207809 = 4293292^2 + 132447^2 .

It is a cyclic number.

It is not a de Polignac number, because 18449898405073 - 2⁴¹ = 16250875149521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18449898404993 and 18449898405011.

It is not a weakly prime, because it can be changed into another prime (18449898405023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9224949202536 + 9224949202537.

It is an arithmetic number, because the mean of its divisors is an integer number (9224949202537).

Almost surely, 2^{18449898405073} is an apocalyptic number.

It is an amenable number.

18449898405073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18449898405073 is an equidigital number, since it uses as much as digits as its factorization.

18449898405073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 278691840, while the sum is 70.

The spelling of 18449898405073 in words is "eighteen trillion, four hundred forty-nine billion, eight hundred ninety-eight million, four hundred five thousand, seventy-three".