18507086441 has 2 divisors, whose sum is σ = 18507086442. Its totient is φ = 18507086440.

The previous prime is 18507086393. The next prime is 18507086501. The reversal of 18507086441 is 14468070581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12503936041 + 6003150400 = 111821^2 + 77480^2 .

It is a cyclic number.

It is not a de Polignac number, because 18507086441 - 2¹⁰ = 18507085417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18507086392 and 18507086401.

It is not a weakly prime, because it can be changed into another prime (18507016441) 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, 9253543220 + 9253543221.

It is an arithmetic number, because the mean of its divisors is an integer number (9253543221).

Almost surely, 2^18507086441 is an apocalyptic number.

It is an amenable number.

18507086441 is a deficient number, since it is larger than the sum of its proper divisors (1).

18507086441 is an equidigital number, since it uses as much as digits as its factorization.

18507086441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 18507086441 in words is "eighteen billion, five hundred seven million, eighty-six thousand, four hundred forty-one".