18122178624 has 112 divisors (see below), whose sum is σ = 52345742400. Its totient is φ = 5487523840.

The previous prime is 18122178623. The next prime is 18122178667. The reversal of 18122178624 is 42687122181.

It is not an unprimeable number, because it can be changed into a prime (18122178623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4164802 + ... + 4169150.

It is an arithmetic number, because the mean of its divisors is an integer number (467372700).

Almost surely, 2^18122178624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18122178624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26172871200).

18122178624 is an abundant number, since it is smaller than the sum of its proper divisors (34223563776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18122178624 is a wasteful number, since it uses less digits than its factorization.

18122178624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348 (or 6338 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The spelling of 18122178624 in words is "eighteen billion, one hundred twenty-two million, one hundred seventy-eight thousand, six hundred twenty-four".