30031133220 has 144 divisors (see below), whose sum is σ = 99490809600. Its totient is φ = 7271846400.

The previous prime is 30031133219. The next prime is 30031133239. The reversal of 30031133220 is 2233113003.

30031133220 is a `hidden beast` number, since 3 + 0 + 0 + 311 + 332 + 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 = 30031133193 and 30031133202.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1795456 + ... + 1812104.

It is an arithmetic number, because the mean of its divisors is an integer number (690908400).

Almost surely, 2^30031133220 is an apocalyptic number.

30031133220 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 30031133220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49745404800).

30031133220 is an abundant number, since it is smaller than the sum of its proper divisors (69459676380).

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

30031133220 is a wasteful number, since it uses less digits than its factorization.

30031133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17586 (or 17581 counting only the distinct ones).

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

Adding to 30031133220 its reverse (2233113003), we get a palindrome (32264246223).

The spelling of 30031133220 in words is "thirty billion, thirty-one million, one hundred thirty-three thousand, two hundred twenty".