18443341210729 has 2 divisors, whose sum is σ = 18443341210730. Its totient is φ = 18443341210728.

The previous prime is 18443341210709. The next prime is 18443341210733. The reversal of 18443341210729 is 92701214334481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9873389418025 + 8569951792704 = 3142195^2 + 2927448^2 .

It is a cyclic number.

It is not a de Polignac number, because 18443341210729 - 2¹¹ = 18443341208681 is a prime.

It is a super-2 number, since 2×18443341210729² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18443341210709) 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, 9221670605364 + 9221670605365.

It is an arithmetic number, because the mean of its divisors is an integer number (9221670605365).

Almost surely, 2^{18443341210729} is an apocalyptic number.

It is an amenable number.

18443341210729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18443341210729 is an equidigital number, since it uses as much as digits as its factorization.

18443341210729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 18443341210729 in words is "eighteen trillion, four hundred forty-three billion, three hundred forty-one million, two hundred ten thousand, seven hundred twenty-nine".