18289795957 has 2 divisors, whose sum is σ = 18289795958. Its totient is φ = 18289795956.

The previous prime is 18289795873. The next prime is 18289795969. The reversal of 18289795957 is 75959798281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15581530276 + 2708265681 = 124826^2 + 52041^2 .

It is a cyclic number.

It is not a de Polignac number, because 18289795957 - 2¹¹ = 18289793909 is a prime.

It is a super-2 number, since 2×18289795957² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18289795157) 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, 9144897978 + 9144897979.

It is an arithmetic number, because the mean of its divisors is an integer number (9144897979).

Almost surely, 2^18289795957 is an apocalyptic number.

It is an amenable number.

18289795957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18289795957 is an equidigital number, since it uses as much as digits as its factorization.

18289795957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114307200, while the sum is 70.

The spelling of 18289795957 in words is "eighteen billion, two hundred eighty-nine million, seven hundred ninety-five thousand, nine hundred fifty-seven".