30312332220 has 24 divisors (see below), whose sum is σ = 84874530384. Its totient is φ = 8083288576.

The previous prime is 30312332213. The next prime is 30312332263. The reversal of 30312332220 is 2223321303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252602709 + ... + 252602828.

It is an arithmetic number, because the mean of its divisors is an integer number (3536438766).

Almost surely, 2^30312332220 is an apocalyptic number.

30312332220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30312332220 is an abundant number, since it is smaller than the sum of its proper divisors (54562198164).

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

30312332220 is a wasteful number, since it uses less digits than its factorization.

30312332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505205549 (or 505205547 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 30312332220 its reverse (2223321303), we get a palindrome (32535653523).

The spelling of 30312332220 in words is "thirty billion, three hundred twelve million, three hundred thirty-two thousand, two hundred twenty".