181081418 has 16 divisors (see below), whose sum is σ = 310902720. Its totient is φ = 77486976.

The previous prime is 181081409. The next prime is 181081421. The reversal of 181081418 is 814180181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188 + ... + 19031.

It is an arithmetic number, because the mean of its divisors is an integer number (19431420).

Almost surely, 2^181081418 is an apocalyptic number.

181081418 is a deficient number, since it is larger than the sum of its proper divisors (129821302).

181081418 is a wasteful number, since it uses less digits than its factorization.

181081418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19901.

The product of its (nonzero) digits is 2048, while the sum is 32.

The square root of 181081418 is about 13456.6495830129. The cubic root of 181081418 is about 565.7500863247.

The spelling of 181081418 in words is "one hundred eighty-one million, eighty-one thousand, four hundred eighteen".