30021233220 has 144 divisors (see below), whose sum is σ = 99918366912. Its totient is φ = 7235723520.

The previous prime is 30021233219. The next prime is 30021233251. The reversal of 30021233220 is 2233212003.

It is a happy number.

30021233220 is a `hidden beast` number, since 300 + 2 + 12 + 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 = 30021233193 and 30021233202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 298719 + ... + 386361.

It is an arithmetic number, because the mean of its divisors is an integer number (693877548).

Almost surely, 2^30021233220 is an apocalyptic number.

30021233220 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 30021233220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49959183456).

30021233220 is an abundant number, since it is smaller than the sum of its proper divisors (69897133692).

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

30021233220 is a wasteful number, since it uses less digits than its factorization.

30021233220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87842 (or 87837 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 30021233220 its reverse (2233212003), we get a palindrome (32254445223).

The spelling of 30021233220 in words is "thirty billion, twenty-one million, two hundred thirty-three thousand, two hundred twenty".