18181073338243 has 8 divisors (see below), whose sum is σ = 18210812881680. Its totient is φ = 18151334678400.

The previous prime is 18181073338177. The next prime is 18181073338249. The reversal of 18181073338243 is 34283337018181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18181073338243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18181073338249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50445903 + ... + 50805031.

It is an arithmetic number, because the mean of its divisors is an integer number (2276351610210).

Almost surely, 2^{18181073338243} is an apocalyptic number.

18181073338243 is a deficient number, since it is larger than the sum of its proper divisors (29739543437).

18181073338243 is an equidigital number, since it uses as much as digits as its factorization.

18181073338243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441797.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 18181073338243 in words is "eighteen trillion, one hundred eighty-one billion, seventy-three million, three hundred thirty-eight thousand, two hundred forty-three".