30047821188 has 96 divisors (see below), whose sum is σ = 87723675648. Its totient is φ = 7776787200.

The previous prime is 30047821169. The next prime is 30047821189. The reversal of 30047821188 is 88112874003.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (30047821189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201781 + ... + 317507.

It is an arithmetic number, because the mean of its divisors is an integer number (913788288).

Almost surely, 2^30047821188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30047821188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43861837824).

30047821188 is an abundant number, since it is smaller than the sum of its proper divisors (57675854460).

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

30047821188 is a wasteful number, since it uses less digits than its factorization.

30047821188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116033 (or 116031 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 30047821188 in words is "thirty billion, forty-seven million, eight hundred twenty-one thousand, one hundred eighty-eight".