30643093921 has 4 divisors (see below), whose sum is σ = 33428829744. Its totient is φ = 27857358100.

The previous prime is 30643093909. The next prime is 30643093927. The reversal of 30643093921 is 12939034603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30643093921 - 2¹¹ = 30643091873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30643093927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392867895 + ... + 1392867916.

It is an arithmetic number, because the mean of its divisors is an integer number (8357207436).

Almost surely, 2^30643093921 is an apocalyptic number.

It is an amenable number.

30643093921 is a deficient number, since it is larger than the sum of its proper divisors (2785735823).

30643093921 is a wasteful number, since it uses less digits than its factorization.

30643093921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785735822.

The product of its (nonzero) digits is 104976, while the sum is 40.

The spelling of 30643093921 in words is "thirty billion, six hundred forty-three million, ninety-three thousand, nine hundred twenty-one".