18817330316317 has 4 divisors (see below), whose sum is σ = 20264817263740. Its totient is φ = 17369843368896.

The previous prime is 18817330316269. The next prime is 18817330316333. The reversal of 18817330316317 is 71361303371881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11723050123236 + 7094280193081 = 3423894^2 + 2663509^2 .

It is a cyclic number.

It is not a de Polignac number, because 18817330316317 - 2⁴³ = 10021237294109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18817330316417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723743473692 + ... + 723743473717.

It is an arithmetic number, because the mean of its divisors is an integer number (5066204315935).

Almost surely, 2^{18817330316317} is an apocalyptic number.

It is an amenable number.

18817330316317 is a deficient number, since it is larger than the sum of its proper divisors (1447486947423).

18817330316317 is a wasteful number, since it uses less digits than its factorization.

18817330316317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447486947422.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 18817330316317 in words is "eighteen trillion, eight hundred seventeen billion, three hundred thirty million, three hundred sixteen thousand, three hundred seventeen".