18472343568 has 80 divisors (see below), whose sum is σ = 54605612160. Its totient is φ = 5271211008.

The previous prime is 18472343537. The next prime is 18472343587. The reversal of 18472343568 is 86534327481.

It is a happy number.

It is a Cunningham number, because it is equal to 135913²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 18472343568.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237846 + ... + 305802.

It is an arithmetic number, because the mean of its divisors is an integer number (682570152).

Almost surely, 2^18472343568 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 18472343568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27302806080).

18472343568 is an abundant number, since it is smaller than the sum of its proper divisors (36133268592).

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

18472343568 is a wasteful number, since it uses less digits than its factorization.

18472343568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68784 (or 68778 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The spelling of 18472343568 in words is "eighteen billion, four hundred seventy-two million, three hundred forty-three thousand, five hundred sixty-eight".