30721347441 has 32 divisors (see below), whose sum is σ = 45927383040. Its totient is φ = 20295306000.

The previous prime is 30721347409. The next prime is 30721347497. The reversal of 30721347441 is 14474312703.

30721347441 is a `hidden beast` number, since 307 + 2 + 1 + 347 + 4 + 4 + 1 = 666.

It is not a de Polignac number, because 30721347441 - 2⁵ = 30721347409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30721347396 and 30721347405.

It is not an unprimeable number, because it can be changed into a prime (30721337441) 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, 1344966 + ... + 1367616.

It is an arithmetic number, because the mean of its divisors is an integer number (1435230720).

Almost surely, 2^30721347441 is an apocalyptic number.

It is an amenable number.

30721347441 is a deficient number, since it is larger than the sum of its proper divisors (15206035599).

30721347441 is a wasteful number, since it uses less digits than its factorization.

30721347441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23114 (or 23108 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 30721347441 in words is "thirty billion, seven hundred twenty-one million, three hundred forty-seven thousand, four hundred forty-one".