30999236356 has 81 divisors (see below), whose sum is σ = 61180142709. Its totient is φ = 13733148000.

The previous prime is 30999236353. The next prime is 30999236357. The reversal of 30999236356 is 65363299903.

The square root of 30999236356 is 176066.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 22347260100 + 8651976256 = 149490^2 + 93016^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30999236297 and 30999236306.

It is not an unprimeable number, because it can be changed into a prime (30999236351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 205292881 + ... + 205293031.

Almost surely, 2^30999236356 is an apocalyptic number.

30999236356 is the 176066-th square number.

It is an amenable number.

30999236356 is a deficient number, since it is larger than the sum of its proper divisors (30180906353).

30999236356 is a wasteful number, since it uses less digits than its factorization.

30999236356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 7085880, while the sum is 55.

The spelling of 30999236356 in words is "thirty billion, nine hundred ninety-nine million, two hundred thirty-six thousand, three hundred fifty-six".