18520222174 has 16 divisors (see below), whose sum is σ = 27934315776. Its totient is φ = 9208813600.

The previous prime is 18520222159. The next prime is 18520222177. The reversal of 18520222174 is 47122202581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18520222177) 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, 1858044 + ... + 1867984.

It is an arithmetic number, because the mean of its divisors is an integer number (1745894736).

Almost surely, 2^18520222174 is an apocalyptic number.

18520222174 is a deficient number, since it is larger than the sum of its proper divisors (9414093602).

18520222174 is a wasteful number, since it uses less digits than its factorization.

18520222174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15011.

The product of its (nonzero) digits is 17920, while the sum is 34.

The spelling of 18520222174 in words is "eighteen billion, five hundred twenty million, two hundred twenty-two thousand, one hundred seventy-four".