18309996122 has 24 divisors (see below), whose sum is σ = 30228359700. Its totient is φ = 8311818240.

The previous prime is 18309996049. The next prime is 18309996127. The reversal of 18309996122 is 22169990381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15590269321 + 2719726801 = 124861^2 + 52151^2 .

It is not an unprimeable number, because it can be changed into a prime (18309996127) 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 11 ways as a sum of consecutive naturals, for example, 136904 + ... + 235292.

Almost surely, 2^18309996122 is an apocalyptic number.

18309996122 is a deficient number, since it is larger than the sum of its proper divisors (11918363578).

18309996122 is a wasteful number, since it uses less digits than its factorization.

18309996122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99182 (or 99171 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 18309996122 in words is "eighteen billion, three hundred nine million, nine hundred ninety-six thousand, one hundred twenty-two".