18083832817 has 4 divisors (see below), whose sum is σ = 18086431716. Its totient is φ = 18081233920.

The previous prime is 18083832803. The next prime is 18083832827. The reversal of 18083832817 is 71823838081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71823838081 = 37 ⋅1941184813.

It can be written as a sum of positive squares in 2 ways, for example, as 3456381681 + 14627451136 = 58791^2 + 120944^2 .

It is a cyclic number.

It is not a de Polignac number, because 18083832817 - 2²³ = 18075444209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18083832827) 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, 1288984 + ... + 1302937.

It is an arithmetic number, because the mean of its divisors is an integer number (4521607929).

Almost surely, 2^18083832817 is an apocalyptic number.

It is an amenable number.

18083832817 is a deficient number, since it is larger than the sum of its proper divisors (2598899).

18083832817 is an equidigital number, since it uses as much as digits as its factorization.

18083832817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598898.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 18083832817 in words is "eighteen billion, eighty-three million, eight hundred thirty-two thousand, eight hundred seventeen".