18218210335205 has 8 divisors (see below), whose sum is σ = 21881565531000. Its totient is φ = 14561426182336.

The previous prime is 18218210335189. The next prime is 18218210335271. The reversal of 18218210335205 is 50253301281281.

It can be written as a sum of positive squares in 4 ways, for example, as 282121384801 + 17936088950404 = 531151^2 + 4235102^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18218210335205 - 2⁴ = 18218210335189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1642754630 + ... + 1642765719.

It is an arithmetic number, because the mean of its divisors is an integer number (2735195691375).

Almost surely, 2^{18218210335205} is an apocalyptic number.

It is an amenable number.

18218210335205 is a deficient number, since it is larger than the sum of its proper divisors (3663355195795).

18218210335205 is a wasteful number, since it uses less digits than its factorization.

18218210335205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285521463.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 18218210335205 in words is "eighteen trillion, two hundred eighteen billion, two hundred ten million, three hundred thirty-five thousand, two hundred five".