18747307169 has 2 divisors, whose sum is σ = 18747307170. Its totient is φ = 18747307168.

The previous prime is 18747307157. The next prime is 18747307177. The reversal of 18747307169 is 96170374781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11860299025 + 6887008144 = 108905^2 + 82988^2 .

It is a cyclic number.

It is not a de Polignac number, because 18747307169 - 2⁸ = 18747306913 is a prime.

It is a super-2 number, since 2×18747307169² (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 18747307169.

It is not a weakly prime, because it can be changed into another prime (18747307069) 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, 9373653584 + 9373653585.

It is an arithmetic number, because the mean of its divisors is an integer number (9373653585).

Almost surely, 2^18747307169 is an apocalyptic number.

It is an amenable number.

18747307169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18747307169 is an equidigital number, since it uses as much as digits as its factorization.

18747307169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 53.

The spelling of 18747307169 in words is "eighteen billion, seven hundred forty-seven million, three hundred seven thousand, one hundred sixty-nine".