18350505109 has 8 divisors (see below), whose sum is σ = 19664043840. Its totient is φ = 17062977216.

The previous prime is 18350505101. The next prime is 18350505161. The reversal of 18350505109 is 90150505381.

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 18350505109 - 2³ = 18350505101 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 (18350505101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6501249 + ... + 6504070.

It is an arithmetic number, because the mean of its divisors is an integer number (2458005480).

Almost surely, 2^18350505109 is an apocalyptic number.

It is an amenable number.

18350505109 is a deficient number, since it is larger than the sum of its proper divisors (1313538731).

18350505109 is a wasteful number, since it uses less digits than its factorization.

18350505109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13005419.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 18350505109 in words is "eighteen billion, three hundred fifty million, five hundred five thousand, one hundred nine".