181820002 has 24 divisors (see below), whose sum is σ = 337516416. Its totient is φ = 71927856.

The previous prime is 181819933. The next prime is 181820033. The reversal of 181820002 is 200028181.

181820002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36058 + ... + 40789.

It is an arithmetic number, because the mean of its divisors is an integer number (14063184).

Almost surely, 2^181820002 is an apocalyptic number.

181820002 is a deficient number, since it is larger than the sum of its proper divisors (155696414).

181820002 is a wasteful number, since it uses less digits than its factorization.

181820002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76882 (or 76869 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 181820002 is about 13484.0647432442. The cubic root of 181820002 is about 566.5182254014.

Adding to 181820002 its reverse (200028181), we get a palindrome (381848183).

The spelling of 181820002 in words is "one hundred eighty-one million, eight hundred twenty thousand, two".