18195318341 has 4 divisors (see below), whose sum is σ = 18209887500. Its totient is φ = 18180749184.

The previous prime is 18195318307. The next prime is 18195318353. The reversal of 18195318341 is 14381359181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14381359181 = 7 ⋅2054479883.

It can be written as a sum of positive squares in 2 ways, for example, as 7435612900 + 10759705441 = 86230^2 + 103729^2 .

It is a cyclic number.

It is not a de Polignac number, because 18195318341 - 2³⁴ = 1015449157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18195318292 and 18195318301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195318371) 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, 7282706 + ... + 7285203.

It is an arithmetic number, because the mean of its divisors is an integer number (4552471875).

Almost surely, 2^18195318341 is an apocalyptic number.

It is an amenable number.

18195318341 is a deficient number, since it is larger than the sum of its proper divisors (14569159).

18195318341 is a wasteful number, since it uses less digits than its factorization.

18195318341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14569158.

The product of its digits is 103680, while the sum is 44.

The spelling of 18195318341 in words is "eighteen billion, one hundred ninety-five million, three hundred eighteen thousand, three hundred forty-one".