181006974 has 40 divisors (see below), whose sum is σ = 411328368. Its totient is φ = 59482080.

The previous prime is 181006967. The next prime is 181007063. The reversal of 181006974 is 479600181.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3634 + ... + 19370.

Almost surely, 2^181006974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181006974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205664184).

181006974 is an abundant number, since it is smaller than the sum of its proper divisors (230321394).

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

181006974 is a wasteful number, since it uses less digits than its factorization.

181006974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15822 (or 15813 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 181006974 is about 13453.8832312459. The cubic root of 181006974 is about 565.6725475897.

The spelling of 181006974 in words is "one hundred eighty-one million, six thousand, nine hundred seventy-four".