30305205312 has 56 divisors (see below), whose sum is σ = 84899150496. Its totient is φ = 9507514368.

The previous prime is 30305205263. The next prime is 30305205319. The reversal of 30305205312 is 21350250303.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (30305205319) 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, 4639078 + ... + 4645605.

Almost surely, 2^30305205312 is an apocalyptic number.

30305205312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30305205312 is an abundant number, since it is smaller than the sum of its proper divisors (54593945184).

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

30305205312 is a wasteful number, since it uses less digits than its factorization.

30305205312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9284715 (or 9284705 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

Adding to 30305205312 its reverse (21350250303), we get a palindrome (51655455615).

The spelling of 30305205312 in words is "thirty billion, three hundred five million, two hundred five thousand, three hundred twelve".