30308136891 has 16 divisors (see below), whose sum is σ = 41420822688. Its totient is φ = 19701017600.

The previous prime is 30308136853. The next prime is 30308136931. The reversal of 30308136891 is 19863180303.

It is a cyclic number.

It is not a de Polignac number, because 30308136891 - 2⁶ = 30308136827 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (30308136841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140095 + ... + 283271.

It is an arithmetic number, because the mean of its divisors is an integer number (2588801418).

Almost surely, 2^30308136891 is an apocalyptic number.

30308136891 is a deficient number, since it is larger than the sum of its proper divisors (11112685797).

30308136891 is a wasteful number, since it uses less digits than its factorization.

30308136891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144942.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 30308136891 in words is "thirty billion, three hundred eight million, one hundred thirty-six thousand, eight hundred ninety-one".