18253611008 has 62 divisors (see below), whose sum is σ = 38654705646. Its totient is φ = 8589934592.

The previous prime is 18253611001. The next prime is 18253611071. The reversal of 18253611008 is 80011635281.

It can be written as a sum of positive squares in only one way, i.e., 17179869184 + 1073741824 = 131072^2 + 32768^2 .

It is a nialpdrome in base 8 and base 16.

It is a zygodrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18253611001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (2) of ones.

In principle, a polygon with 18253611008 sides can be constructed with ruler and compass.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073741816 + ... + 1073741832.

Almost surely, 2^18253611008 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 18253611008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19327352823).

18253611008 is an abundant number, since it is smaller than the sum of its proper divisors (20401094638).

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

18253611008 is an frugal number, since it uses more digits than its factorization.

18253611008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 19 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 18253611008 in words is "eighteen billion, two hundred fifty-three million, six hundred eleven thousand, eight".