30123100206 has 20 divisors (see below), whose sum is σ = 67498058232. Its totient is φ = 10041033348.

The previous prime is 30123100181. The next prime is 30123100229. The reversal of 30123100206 is 60200132103.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 92972370 + ... + 92972693.

Almost surely, 2^30123100206 is an apocalyptic number.

30123100206 is an abundant number, since it is smaller than the sum of its proper divisors (37374958026).

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

30123100206 is a wasteful number, since it uses less digits than its factorization.

30123100206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185945077 (or 185945068 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30123100206 its reverse (60200132103), we get a palindrome (90323232309).

The spelling of 30123100206 in words is "thirty billion, one hundred twenty-three million, one hundred thousand, two hundred six".