30312133020 has 72 divisors (see below), whose sum is σ = 99019642176. Its totient is φ = 7461447552.

The previous prime is 30312132989. The next prime is 30312133031. The reversal of 30312133020 is 2033121303.

30312133020 is a `hidden beast` number, since 3 + 0 + 312 + 1 + 330 + 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 = 30312132984 and 30312133002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6474612 + ... + 6479291.

It is an arithmetic number, because the mean of its divisors is an integer number (1375272808).

Almost surely, 2^30312133020 is an apocalyptic number.

30312133020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30312133020 is an abundant number, since it is smaller than the sum of its proper divisors (68707509156).

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

30312133020 is a wasteful number, since it uses less digits than its factorization.

30312133020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12953931 (or 12953926 counting only the distinct ones).

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

Adding to 30312133020 its reverse (2033121303), we get a palindrome (32345254323).

The spelling of 30312133020 in words is "thirty billion, three hundred twelve million, one hundred thirty-three thousand, twenty".