18383728290869 has 2 divisors, whose sum is σ = 18383728290870. Its totient is φ = 18383728290868.

The previous prime is 18383728290839. The next prime is 18383728290937. The reversal of 18383728290869 is 96809282738381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14706749463844 + 3676978827025 = 3834938^2 + 1917545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18383728290869 is a prime.

It is a super-2 number, since 2×18383728290869² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18383728290796 and 18383728290805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18383728290839) 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, 9191864145434 + 9191864145435.

It is an arithmetic number, because the mean of its divisors is an integer number (9191864145435).

Almost surely, 2^{18383728290869} is an apocalyptic number.

It is an amenable number.

18383728290869 is a deficient number, since it is larger than the sum of its proper divisors (1).

18383728290869 is an equidigital number, since it uses as much as digits as its factorization.

18383728290869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501645312, while the sum is 74.

The spelling of 18383728290869 in words is "eighteen trillion, three hundred eighty-three billion, seven hundred twenty-eight million, two hundred ninety thousand, eight hundred sixty-nine".