18505703247019 has 2 divisors, whose sum is σ = 18505703247020. Its totient is φ = 18505703247018.

The previous prime is 18505703246993. The next prime is 18505703247049. The reversal of 18505703247019 is 91074230750581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18505703247019 - 2¹⁷ = 18505703115947 is a prime.

It is a super-2 number, since 2×18505703247019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18505703247049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9252851623509 + 9252851623510.

It is an arithmetic number, because the mean of its divisors is an integer number (9252851623510).

Almost surely, 2^{18505703247019} is an apocalyptic number.

18505703247019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18505703247019 is an equidigital number, since it uses as much as digits as its factorization.

18505703247019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 18505703247019 in words is "eighteen trillion, five hundred five billion, seven hundred three million, two hundred forty-seven thousand, nineteen".