30312130020 has 48 divisors (see below), whose sum is σ = 85244631360. Its totient is φ = 8047933056.

The previous prime is 30312130019. The next prime is 30312130067. The reversal of 30312130020 is 2003121303.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1089322 + ... + 1116801.

It is an arithmetic number, because the mean of its divisors is an integer number (1775929820).

Almost surely, 2^30312130020 is an apocalyptic number.

30312130020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30312130020 is an abundant number, since it is smaller than the sum of its proper divisors (54932501340).

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

30312130020 is a wasteful number, since it uses less digits than its factorization.

30312130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206364 (or 2206362 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 30312130020 its reverse (2003121303), we get a palindrome (32315251323).

The spelling of 30312130020 in words is "thirty billion, three hundred twelve million, one hundred thirty thousand, twenty".