18012860944 has 135 divisors (see below), whose sum is σ = 39583817013. Its totient is φ = 7936760832.

The previous prime is 18012860939. The next prime is 18012860963. The reversal of 18012860944 is 44906821081.

The square root of 18012860944 is 134212.

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

It can be written as a sum of positive squares in 13 ways, for example, as 17875690000 + 137170944 = 133700^2 + 11712^2 .

It is a super-2 number, since 2×18012860944² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18012860944.

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 26 ways as a sum of consecutive naturals, for example, 202391652 + ... + 202391740.

Almost surely, 2^18012860944 is an apocalyptic number.

18012860944 is the 134212-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18012860944

18012860944 is an abundant number, since it is smaller than the sum of its proper divisors (21570956069).

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

18012860944 is an equidigital number, since it uses as much as digits as its factorization.

18012860944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 18012860944 in words is "eighteen billion, twelve million, eight hundred sixty thousand, nine hundred forty-four".