18000153331728 has 160 divisors (see below), whose sum is σ = 47720200176000. Its totient is φ = 5844615782400.

The previous prime is 18000153331723. The next prime is 18000153331747. The reversal of 18000153331728 is 82713335100081.

It is a happy number.

It is a super-2 number, since 2×18000153331728² (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 18000153331728.

It is not an unprimeable number, because it can be changed into a prime (18000153331723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 689674423 + ... + 689700521.

It is an arithmetic number, because the mean of its divisors is an integer number (298251251100).

Almost surely, 2^{18000153331728} 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 18000153331728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23860100088000).

18000153331728 is an abundant number, since it is smaller than the sum of its proper divisors (29720046844272).

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

18000153331728 is a wasteful number, since it uses less digits than its factorization.

18000153331728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28441 (or 28435 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 18000153331728 in words is "eighteen trillion, one hundred fifty-three million, three hundred thirty-one thousand, seven hundred twenty-eight".