18018002016 has 192 divisors, whose sum is σ = 62671795200. Its totient is φ = 4924136448.

The previous prime is 18018002003. The next prime is 18018002027. The reversal of 18018002016 is 61020081081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74340 + ... + 203868.

It is an arithmetic number, because the mean of its divisors is an integer number (326415600).

Almost surely, 2^18018002016 is an apocalyptic number.

18018002016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18018002016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31335897600).

18018002016 is an abundant number, since it is smaller than the sum of its proper divisors (44653793184).

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

18018002016 is a wasteful number, since it uses less digits than its factorization.

18018002016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129578 (or 129564 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

Adding to 18018002016 its reverse (61020081081), we get a palindrome (79038083097).

The spelling of 18018002016 in words is "eighteen billion, eighteen million, two thousand, sixteen".