30643093920 has 48 divisors (see below), whose sum is σ = 96525747360. Its totient is φ = 8171491584.

The previous prime is 30643093909. The next prime is 30643093927. The reversal of 30643093920 is 2939034603.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31919410 + ... + 31920369.

It is an arithmetic number, because the mean of its divisors is an integer number (2010953070).

Almost surely, 2^30643093920 is an apocalyptic number.

30643093920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30643093920 is an abundant number, since it is smaller than the sum of its proper divisors (65882653440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30643093920 is a wasteful number, since it uses less digits than its factorization.

30643093920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63839797 (or 63839789 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 39.

The spelling of 30643093920 in words is "thirty billion, six hundred forty-three million, ninety-three thousand, nine hundred twenty".