30686818939 has 12 divisors (see below), whose sum is σ = 35703261000. Its totient is φ = 26298309408.

The previous prime is 30686818931. The next prime is 30686818963. The reversal of 30686818939 is 93981868603.

It is not a de Polignac number, because 30686818939 - 2³ = 30686818931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30686818931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238287 + ... + 343735.

It is an arithmetic number, because the mean of its divisors is an integer number (2975271750).

Almost surely, 2^30686818939 is an apocalyptic number.

30686818939 is a deficient number, since it is larger than the sum of its proper divisors (5016442061).

30686818939 is a wasteful number, since it uses less digits than its factorization.

30686818939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111402 (or 111395 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 30686818939 in words is "thirty billion, six hundred eighty-six million, eight hundred eighteen thousand, nine hundred thirty-nine".