18035647217 has 12 divisors (see below), whose sum is σ = 21042517860. Its totient is φ = 15413239296.

The previous prime is 18035647199. The next prime is 18035647237. The reversal of 18035647217 is 71274653081.

It can be written as a sum of positive squares in 2 ways, for example, as 12098020081 + 5937627136 = 109991^2 + 77056^2 .

It is not a de Polignac number, because 18035647217 - 2¹⁸ = 18035385073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18035647237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 529592 + ... + 562617.

It is an arithmetic number, because the mean of its divisors is an integer number (1753543155).

Almost surely, 2^18035647217 is an apocalyptic number.

It is an amenable number.

18035647217 is a deficient number, since it is larger than the sum of its proper divisors (3006870643).

18035647217 is a wasteful number, since it uses less digits than its factorization.

18035647217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092560 (or 1092553 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 18035647217 in words is "eighteen billion, thirty-five million, six hundred forty-seven thousand, two hundred seventeen".