18181820002 has 8 divisors (see below), whose sum is σ = 27295033536. Its totient is φ = 9083475492.

The previous prime is 18181819939. The next prime is 18181820023. The reversal of 18181820002 is 20002818181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 3714198 + ... + 3719089.

It is an arithmetic number, because the mean of its divisors is an integer number (3411879192).

Almost surely, 2^18181820002 is an apocalyptic number.

18181820002 is a deficient number, since it is larger than the sum of its proper divisors (9113213534).

18181820002 is a wasteful number, since it uses less digits than its factorization.

18181820002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7434512.

The product of its (nonzero) digits is 2048, while the sum is 31.

The spelling of 18181820002 in words is "eighteen billion, one hundred eighty-one million, eight hundred twenty thousand, two".