18018218422 has 16 divisors (see below), whose sum is σ = 27733294512. Its totient is φ = 8774529280.

The previous prime is 18018218401. The next prime is 18018218429. The reversal of 18018218422 is 22481281081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18018218429) 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, 136648 + ... + 233899.

It is an arithmetic number, because the mean of its divisors is an integer number (1733330907).

Almost surely, 2^18018218422 is an apocalyptic number.

18018218422 is a deficient number, since it is larger than the sum of its proper divisors (9715076090).

18018218422 is a wasteful number, since it uses less digits than its factorization.

18018218422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371183.

The product of its (nonzero) digits is 16384, while the sum is 37.

The spelling of 18018218422 in words is "eighteen billion, eighteen million, two hundred eighteen thousand, four hundred twenty-two".