30894123902 has 32 divisors (see below), whose sum is σ = 50871525120. Its totient is φ = 14007882240.

The previous prime is 30894123889. The next prime is 30894123941. The reversal of 30894123902 is 20932149803.

It is a self number, because there is not a number n which added to its sum of digits gives 30894123902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177368 + ... + 305364.

It is an arithmetic number, because the mean of its divisors is an integer number (1589735160).

Almost surely, 2^30894123902 is an apocalyptic number.

30894123902 is a deficient number, since it is larger than the sum of its proper divisors (19977401218).

30894123902 is a wasteful number, since it uses less digits than its factorization.

30894123902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128276.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 30894123902 in words is "thirty billion, eight hundred ninety-four million, one hundred twenty-three thousand, nine hundred two".