30191309203 has 4 divisors (see below), whose sum is σ = 32935973688. Its totient is φ = 27446644720.

The previous prime is 30191309189. The next prime is 30191309219. The reversal of 30191309203 is 30290319103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30290319103 = 11 ⋅2753665373.

It is a de Polignac number, because none of the positive numbers 2^k-30191309203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30191309243) by changing a digit.

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, 1372332226 + ... + 1372332247.

It is an arithmetic number, because the mean of its divisors is an integer number (8233993422).

Almost surely, 2^30191309203 is an apocalyptic number.

30191309203 is a deficient number, since it is larger than the sum of its proper divisors (2744664485).

30191309203 is a wasteful number, since it uses less digits than its factorization.

30191309203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744664484.

The product of its (nonzero) digits is 4374, while the sum is 31.

The spelling of 30191309203 in words is "thirty billion, one hundred ninety-one million, three hundred nine thousand, two hundred three".