30123312020 has 96 divisors (see below), whose sum is σ = 66110204160. Its totient is φ = 11520875520.

The previous prime is 30123312019. The next prime is 30123312047. The reversal of 30123312020 is 2021332103.

It is a self number, because there is not a number n which added to its sum of digits gives 30123312020.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7881710 + ... + 7885530.

It is an arithmetic number, because the mean of its divisors is an integer number (688647960).

Almost surely, 2^30123312020 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 30123312020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33055102080).

30123312020 is an abundant number, since it is smaller than the sum of its proper divisors (35986892140).

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

30123312020 is a wasteful number, since it uses less digits than its factorization.

30123312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065 (or 4063 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30123312020 its reverse (2021332103), we get a palindrome (32144644123).

The spelling of 30123312020 in words is "thirty billion, one hundred twenty-three million, three hundred twelve thousand, twenty".