181105012 has 24 divisors (see below), whose sum is σ = 366085440. Its totient is φ = 77477760.

The previous prime is 181105009. The next prime is 181105027. The reversal of 181105012 is 210501181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120312 + ... + 121807.

It is an arithmetic number, because the mean of its divisors is an integer number (15253560).

Almost surely, 2^181105012 is an apocalyptic number.

It is an amenable number.

181105012 is an abundant number, since it is smaller than the sum of its proper divisors (184980428).

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

181105012 is a wasteful number, since it uses less digits than its factorization.

181105012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242151 (or 242149 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 181105012 is about 13457.5262214123. The cubic root of 181105012 is about 565.7746567232.

Adding to 181105012 its reverse (210501181), we get a palindrome (391606193).

The spelling of 181105012 in words is "one hundred eighty-one million, one hundred five thousand, twelve".