30213331220 has 24 divisors (see below), whose sum is σ = 63500353224. Its totient is φ = 12075359616.

The previous prime is 30213331207. The next prime is 30213331229. The reversal of 30213331220 is 2213331203.

It can be written as a sum of positive squares in 4 ways, for example, as 11062276 + 30202268944 = 3326^2 + 173788^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30213331192 and 30213331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30213331229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598439 + ... + 646958.

It is an arithmetic number, because the mean of its divisors is an integer number (2645848051).

Almost surely, 2^30213331220 is an apocalyptic number.

It is an amenable number.

30213331220 is an abundant number, since it is smaller than the sum of its proper divisors (33287022004).

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

30213331220 is a wasteful number, since it uses less digits than its factorization.

30213331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246619 (or 1246617 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 30213331220 its reverse (2213331203), we get a palindrome (32426662423).

The spelling of 30213331220 in words is "thirty billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred twenty".