18159021122 has 32 divisors (see below), whose sum is σ = 30571573824. Its totient is φ = 8019475200.

The previous prime is 18159021113. The next prime is 18159021143. The reversal of 18159021122 is 22112095181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23222 + ... + 191982.

It is an arithmetic number, because the mean of its divisors is an integer number (955361682).

Almost surely, 2^18159021122 is an apocalyptic number.

18159021122 is a deficient number, since it is larger than the sum of its proper divisors (12412552702).

18159021122 is a wasteful number, since it uses less digits than its factorization.

18159021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168914.

The product of its (nonzero) digits is 2880, while the sum is 32.

The spelling of 18159021122 in words is "eighteen billion, one hundred fifty-nine million, twenty-one thousand, one hundred twenty-two".