30733946721 has 63 divisors (see below), whose sum is σ = 47490881697. Its totient is φ = 19880267400.

The previous prime is 30733946713. The next prime is 30733946731. The reversal of 30733946721 is 12764933703.

It is a happy number.

The square root of 30733946721 is 175311.

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

30733946721 is a `hidden beast` number, since 307 + 339 + 4 + 6 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 30733946721 - 2³ = 30733946713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30733946701) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 203535996 + ... + 203536146.

It is an arithmetic number, because the mean of its divisors is an integer number (753823519).

Almost surely, 2^30733946721 is an apocalyptic number.

30733946721 is the 175311-st square number.

30733946721 is the 87656-th centered octagonal number.

It is an amenable number.

30733946721 is a deficient number, since it is larger than the sum of its proper divisors (16756934976).

30733946721 is an frugal number, since it uses more digits than its factorization.

30733946721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The spelling of 30733946721 in words is "thirty billion, seven hundred thirty-three million, nine hundred forty-six thousand, seven hundred twenty-one".