30311231020 has 48 divisors (see below), whose sum is σ = 74713101120. Its totient is φ = 10111544064.

The previous prime is 30311231003. The next prime is 30311231021. The reversal of 30311231020 is 2013211303.

It is a junction number, because it is equal to n+sod(n) for n = 30311230985 and 30311231003.

It is not an unprimeable number, because it can be changed into a prime (30311231021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2920615 + ... + 2930974.

It is an arithmetic number, because the mean of its divisors is an integer number (1556522940).

Almost surely, 2^30311231020 is an apocalyptic number.

It is an amenable number.

30311231020 is an abundant number, since it is smaller than the sum of its proper divisors (44401870100).

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

30311231020 is a wasteful number, since it uses less digits than its factorization.

30311231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5851642 (or 5851640 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 30311231020 its reverse (2013211303), we get a palindrome (32324442323).

The spelling of 30311231020 in words is "thirty billion, three hundred eleven million, two hundred thirty-one thousand, twenty".