30685086871 has 4 divisors (see below), whose sum is σ = 31188121144. Its totient is φ = 30182052600.

The previous prime is 30685086869. The next prime is 30685086893. The reversal of 30685086871 is 17868058603.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30685086871 - 2¹ = 30685086869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30685080871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251517045 + ... + 251517166.

It is an arithmetic number, because the mean of its divisors is an integer number (7797030286).

Almost surely, 2^30685086871 is an apocalyptic number.

30685086871 is a deficient number, since it is larger than the sum of its proper divisors (503034273).

30685086871 is an equidigital number, since it uses as much as digits as its factorization.

30685086871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503034272.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 30685086871 in words is "thirty billion, six hundred eighty-five million, eighty-six thousand, eight hundred seventy-one".