18219055318 has 16 divisors (see below), whose sum is σ = 27790315056. Its totient is φ = 8955764640.

The previous prime is 18219055313. The next prime is 18219055403. The reversal of 18219055318 is 81355091281.

It is a super-2 number, since 2×18219055318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18219055313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218280 + ... + 289972.

It is an arithmetic number, because the mean of its divisors is an integer number (1736894691).

Almost surely, 2^18219055318 is an apocalyptic number.

18219055318 is a deficient number, since it is larger than the sum of its proper divisors (9571259738).

18219055318 is a wasteful number, since it uses less digits than its factorization.

18219055318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73839.

The product of its (nonzero) digits is 86400, while the sum is 43.

The spelling of 18219055318 in words is "eighteen billion, two hundred nineteen million, fifty-five thousand, three hundred eighteen".