18700001773 has 2 divisors, whose sum is σ = 18700001774. Its totient is φ = 18700001772.

The previous prime is 18700001767. The next prime is 18700001851. The reversal of 18700001773 is 37710000781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18695913289 + 4088484 = 136733^2 + 2022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18700001773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18700008773) 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, 9350000886 + 9350000887.

It is an arithmetic number, because the mean of its divisors is an integer number (9350000887).

Almost surely, 2^18700001773 is an apocalyptic number.

It is an amenable number.

18700001773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700001773 is an equidigital number, since it uses as much as digits as its factorization.

18700001773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 34.

The spelling of 18700001773 in words is "eighteen billion, seven hundred million, one thousand, seven hundred seventy-three".