181321834 has 16 divisors (see below), whose sum is σ = 286327872. Its totient is φ = 85949248.

The previous prime is 181321823. The next prime is 181321843. The reversal of 181321834 is 438123181.

It is a junction number, because it is equal to n+sod(n) for n = 181321796 and 181321805.

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, 12244 + ... + 22639.

It is an arithmetic number, because the mean of its divisors is an integer number (17895492).

Almost surely, 2^181321834 is an apocalyptic number.

181321834 is a deficient number, since it is larger than the sum of its proper divisors (105006038).

181321834 is a wasteful number, since it uses less digits than its factorization.

181321834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35021.

The product of its digits is 4608, while the sum is 31.

The square root of 181321834 is about 13465.5796013391. The cubic root of 181321834 is about 566.0003516919. Note that the first 3 decimals are identical.

The spelling of 181321834 in words is "one hundred eighty-one million, three hundred twenty-one thousand, eight hundred thirty-four".