30721433412704 has 24 divisors (see below), whose sum is σ = 60487487213328. Its totient is φ = 15359531898240.

The previous prime is 30721433412689. The next prime is 30721433412707. The reversal of 30721433412704 is 40721433412703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30721433412707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36603827 + ... + 37433714.

It is an arithmetic number, because the mean of its divisors is an integer number (2520311967222).

Almost surely, 2^{30721433412704} is an apocalyptic number.

It is an amenable number.

30721433412704 is a deficient number, since it is larger than the sum of its proper divisors (29766053800624).

30721433412704 is a wasteful number, since it uses less digits than its factorization.

30721433412704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74050518 (or 74050510 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 41.

Subtracting 30721433412704 from its reverse (40721433412703), we obtain a palindrome (9999999999999).

The spelling of 30721433412704 in words is "thirty trillion, seven hundred twenty-one billion, four hundred thirty-three million, four hundred twelve thousand, seven hundred four".