18673734529 has 2 divisors, whose sum is σ = 18673734530. Its totient is φ = 18673734528.

The previous prime is 18673734509. The next prime is 18673734533. The reversal of 18673734529 is 92543737681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10269795600 + 8403938929 = 101340^2 + 91673^2 .

It is an emirp because it is prime and its reverse (92543737681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18673734529 - 2²⁹ = 18136863617 is a prime.

It is a super-2 number, since 2×18673734529² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18673734529.

It is not a weakly prime, because it can be changed into another prime (18673734509) 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 as a sum of consecutive naturals, namely, 9336867264 + 9336867265.

It is an arithmetic number, because the mean of its divisors is an integer number (9336867265).

Almost surely, 2^18673734529 is an apocalyptic number.

It is an amenable number.

18673734529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18673734529 is an equidigital number, since it uses as much as digits as its factorization.

18673734529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 55.

The spelling of 18673734529 in words is "eighteen billion, six hundred seventy-three million, seven hundred thirty-four thousand, five hundred twenty-nine".