18446840467009 has 2 divisors, whose sum is σ = 18446840467010. Its totient is φ = 18446840467008.

The previous prime is 18446840466991. The next prime is 18446840467051. The reversal of 18446840467009 is 90076404864481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17760088489984 + 686751977025 = 4214272^2 + 828705^2 .

It is a cyclic number.

It is not a de Polignac number, because 18446840467009 - 2²¹ = 18446838369857 is a prime.

It is not a weakly prime, because it can be changed into another prime (18446840467309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223420233504 + 9223420233505.

It is an arithmetic number, because the mean of its divisors is an integer number (9223420233505).

Almost surely, 2^{18446840467009} is an apocalyptic number.

It is an amenable number.

18446840467009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18446840467009 is an equidigital number, since it uses as much as digits as its factorization.

18446840467009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37158912, while the sum is 61.

The spelling of 18446840467009 in words is "eighteen trillion, four hundred forty-six billion, eight hundred forty million, four hundred sixty-seven thousand, nine".