18545716481 has 2 divisors, whose sum is σ = 18545716482. Its totient is φ = 18545716480.

The previous prime is 18545716463. The next prime is 18545716499. The reversal of 18545716481 is 18461754581.

It is a balanced prime because it is at equal distance from previous prime (18545716463) and next prime (18545716499).

It can be written as a sum of positive squares in only one way, i.e., 14898643600 + 3647072881 = 122060^2 + 60391^2 .

It is a cyclic number.

It is not a de Polignac number, because 18545716481 - 2¹⁴ = 18545700097 is a prime.

It is a super-2 number, since 2×18545716481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18545716411) 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, 9272858240 + 9272858241.

It is an arithmetic number, because the mean of its divisors is an integer number (9272858241).

Almost surely, 2^18545716481 is an apocalyptic number.

It is an amenable number.

18545716481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18545716481 is an equidigital number, since it uses as much as digits as its factorization.

18545716481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1075200, while the sum is 50.

The spelling of 18545716481 in words is "eighteen billion, five hundred forty-five million, seven hundred sixteen thousand, four hundred eighty-one".