30312331020 has 144 divisors (see below), whose sum is σ = 93149696640. Its totient is φ = 7978176000.

The previous prime is 30312331013. The next prime is 30312331031. The reversal of 30312331020 is 2013321303.

30312331020 is a `hidden beast` number, since 3 + 0 + 312 + 331 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30312330984 and 30312331002.

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 47 ways as a sum of consecutive naturals, for example, 5314170 + ... + 5319870.

Almost surely, 2^30312331020 is an apocalyptic number.

30312331020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30312331020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46574848320).

30312331020 is an abundant number, since it is smaller than the sum of its proper divisors (62837365620).

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

30312331020 is a wasteful number, since it uses less digits than its factorization.

30312331020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096 (or 6091 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 30312331020 its reverse (2013321303), we get a palindrome (32325652323).

The spelling of 30312331020 in words is "thirty billion, three hundred twelve million, three hundred thirty-one thousand, twenty".