18044882497 has 2 divisors, whose sum is σ = 18044882498. Its totient is φ = 18044882496.

The previous prime is 18044882489. The next prime is 18044882519. The reversal of 18044882497 is 79428844081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17850028816 + 194853681 = 133604^2 + 13959^2 .

It is an emirp because it is prime and its reverse (79428844081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18044882497 - 2³ = 18044882489 is a prime.

It is not a weakly prime, because it can be changed into another prime (18044882477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022441248 + 9022441249.

It is an arithmetic number, because the mean of its divisors is an integer number (9022441249).

Almost surely, 2^18044882497 is an apocalyptic number.

It is an amenable number.

18044882497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18044882497 is an equidigital number, since it uses as much as digits as its factorization.

18044882497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 18044882497 in words is "eighteen billion, forty-four million, eight hundred eighty-two thousand, four hundred ninety-seven".