18465218448 has 40 divisors (see below), whose sum is σ = 49240586496. Its totient is φ = 5956521600.

The previous prime is 18465218441. The next prime is 18465218477. The reversal of 18465218448 is 84481256481.

It is a self number, because there is not a number n which added to its sum of digits gives 18465218448.

It is not an unprimeable number, because it can be changed into a prime (18465218441) 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, 6203223 + ... + 6206198.

Almost surely, 2^18465218448 is an apocalyptic number.

It is an amenable number.

18465218448 is an abundant number, since it is smaller than the sum of its proper divisors (30775368048).

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

18465218448 is a wasteful number, since it uses less digits than its factorization.

18465218448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12409463 (or 12409457 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 51.

The spelling of 18465218448 in words is "eighteen billion, four hundred sixty-five million, two hundred eighteen thousand, four hundred forty-eight".