30686822818 has 8 divisors (see below), whose sum is σ = 46547428140. Its totient is φ = 15171013440.

The previous prime is 30686822783. The next prime is 30686822839. The reversal of 30686822818 is 81822868603.

It can be written as a sum of positive squares in 2 ways, for example, as 30587561449 + 99261369 = 174893^2 + 9963^2 .

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

It is a super-2 number, since 2×30686822818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86198763 + ... + 86199118.

Almost surely, 2^30686822818 is an apocalyptic number.

30686822818 is a deficient number, since it is larger than the sum of its proper divisors (15860605322).

30686822818 is a wasteful number, since it uses less digits than its factorization.

30686822818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172397972.

The product of its (nonzero) digits is 1769472, while the sum is 52.

The spelling of 30686822818 in words is "thirty billion, six hundred eighty-six million, eight hundred twenty-two thousand, eight hundred eighteen".