18953135273 has 2 divisors, whose sum is σ = 18953135274. Its totient is φ = 18953135272.

The previous prime is 18953135251. The next prime is 18953135317. The reversal of 18953135273 is 37253135981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13178351209 + 5774784064 = 114797^2 + 75992^2 .

It is a cyclic number.

It is not a de Polignac number, because 18953135273 - 2¹⁸ = 18952873129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18953135203) 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, 9476567636 + 9476567637.

It is an arithmetic number, because the mean of its divisors is an integer number (9476567637).

Almost surely, 2^18953135273 is an apocalyptic number.

It is an amenable number.

18953135273 is a deficient number, since it is larger than the sum of its proper divisors (1).

18953135273 is an equidigital number, since it uses as much as digits as its factorization.

18953135273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The spelling of 18953135273 in words is "eighteen billion, nine hundred fifty-three million, one hundred thirty-five thousand, two hundred seventy-three".