18263412817 has 16 divisors (see below), whose sum is σ = 21136090752. Its totient is φ = 15630024960.

The previous prime is 18263412809. The next prime is 18263412841. The reversal of 18263412817 is 71821436281.

It is a cyclic number.

It is not a de Polignac number, because 18263412817 - 2³ = 18263412809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18263412847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601909 + ... + 631522.

It is an arithmetic number, because the mean of its divisors is an integer number (1321005672).

Almost surely, 2^18263412817 is an apocalyptic number.

18263412817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18263412817 is a deficient number, since it is larger than the sum of its proper divisors (2872677935).

18263412817 is a wasteful number, since it uses less digits than its factorization.

18263412817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233528.

The product of its digits is 129024, while the sum is 43.

The spelling of 18263412817 in words is "eighteen billion, two hundred sixty-three million, four hundred twelve thousand, eight hundred seventeen".