30684902871 has 16 divisors (see below), whose sum is σ = 48370291200. Its totient is φ = 16929601248.

The previous prime is 30684902867. The next prime is 30684902873. The reversal of 30684902871 is 17820948603.

It is not a de Polignac number, because 30684902871 - 2² = 30684902867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30684902871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30684902873) 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, 25192251 + ... + 25193468.

It is an arithmetic number, because the mean of its divisors is an integer number (3023143200).

Almost surely, 2^30684902871 is an apocalyptic number.

30684902871 is a deficient number, since it is larger than the sum of its proper divisors (17685388329).

30684902871 is a wasteful number, since it uses less digits than its factorization.

30684902871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50385758.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 30684902871 in words is "thirty billion, six hundred eighty-four million, nine hundred two thousand, eight hundred seventy-one".