18181834704 has 120 divisors (see below), whose sum is σ = 56419987104. Its totient is φ = 5419296000.

The previous prime is 18181834691. The next prime is 18181834729. The reversal of 18181834704 is 40743818181.

It is a super-2 number, since 2×18181834704² (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 18181834704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2539 + ... + 190709.

Almost surely, 2^18181834704 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 18181834704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28209993552).

18181834704 is an abundant number, since it is smaller than the sum of its proper divisors (38238152400).

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

18181834704 is a wasteful number, since it uses less digits than its factorization.

18181834704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188257 (or 188248 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 18181834704 in words is "eighteen billion, one hundred eighty-one million, eight hundred thirty-four thousand, seven hundred four".