30993885312 has 256 divisors, whose sum is σ = 94011294720. Its totient is φ = 8977858560.

The previous prime is 30993885289. The next prime is 30993885319. The reversal of 30993885312 is 21358839903.

It is not an unprimeable number, because it can be changed into a prime (30993885319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5723118 + ... + 5728530.

It is an arithmetic number, because the mean of its divisors is an integer number (367231620).

Almost surely, 2^30993885312 is an apocalyptic number.

30993885312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30993885312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47005647360).

30993885312 is an abundant number, since it is smaller than the sum of its proper divisors (63017409408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30993885312 is a wasteful number, since it uses less digits than its factorization.

30993885312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511 (or 5499 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 30993885312 in words is "thirty billion, nine hundred ninety-three million, eight hundred eighty-five thousand, three hundred twelve".