18147322944 has 105 divisors (see below), whose sum is σ = 53823117271. Its totient is φ = 6045874560.

The previous prime is 18147322939. The next prime is 18147322957. The reversal of 18147322944 is 44922374181.

The square root of 18147322944 is 134712.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18147322944.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9698329 + ... + 9700199.

Almost surely, 2^18147322944 is an apocalyptic number.

18147322944 is the 134712-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18147322944

18147322944 is an abundant number, since it is smaller than the sum of its proper divisors (35675794327).

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

18147322944 is an frugal number, since it uses more digits than its factorization.

18147322944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766 (or 1876 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 18147322944 in words is "eighteen billion, one hundred forty-seven million, three hundred twenty-two thousand, nine hundred forty-four".