18382929281 has 2 divisors, whose sum is σ = 18382929282. Its totient is φ = 18382929280.

The previous prime is 18382929251. The next prime is 18382929337. The reversal of 18382929281 is 18292928381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17695650625 + 687278656 = 133025^2 + 26216^2 .

It is a cyclic number.

It is not a de Polignac number, because 18382929281 - 2⁶ = 18382929217 is a prime.

It is a super-2 number, since 2×18382929281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18382929251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9191464640 + 9191464641.

It is an arithmetic number, because the mean of its divisors is an integer number (9191464641).

Almost surely, 2^18382929281 is an apocalyptic number.

It is an amenable number.

18382929281 is a deficient number, since it is larger than the sum of its proper divisors (1).

18382929281 is an equidigital number, since it uses as much as digits as its factorization.

18382929281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 53.

The spelling of 18382929281 in words is "eighteen billion, three hundred eighty-two million, nine hundred twenty-nine thousand, two hundred eighty-one".