18003723726248 has 128 divisors (see below), whose sum is σ = 36906768007200. Its totient is φ = 8183777918976.

The previous prime is 18003723726229. The next prime is 18003723726251. The reversal of 18003723726248 is 84262732730081.

It can be written as a sum of positive squares in 16 ways, for example, as 2714513266084 + 15289210460164 = 1647578^2 + 3910142^2 .

It is a super-2 number, since 2×18003723726248² (a number of 27 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 18003723726248.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3649647590 + ... + 3649652522.

Almost surely, 2^{18003723726248} 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 18003723726248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18453384003600).

18003723726248 is an abundant number, since it is smaller than the sum of its proper divisors (18903044280952).

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

18003723726248 is a wasteful number, since it uses less digits than its factorization.

18003723726248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511 (or 6507 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 18003723726248 in words is "eighteen trillion, three billion, seven hundred twenty-three million, seven hundred twenty-six thousand, two hundred forty-eight".