30639256894 has 16 divisors (see below), whose sum is σ = 47033788032. Its totient is φ = 14961419928.

The previous prime is 30639256861. The next prime is 30639256897. The reversal of 30639256894 is 49865293603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30639256897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824887 + ... + 861229.

It is an arithmetic number, because the mean of its divisors is an integer number (2939611752).

Almost surely, 2^30639256894 is an apocalyptic number.

30639256894 is a deficient number, since it is larger than the sum of its proper divisors (16394531138).

30639256894 is a wasteful number, since it uses less digits than its factorization.

30639256894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46191.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 30639256894 in words is "thirty billion, six hundred thirty-nine million, two hundred fifty-six thousand, eight hundred ninety-four".