12310020 has 36 divisors (see below), whose sum is σ = 37340940. Its totient is φ = 3282624.

The previous prime is 12310019. The next prime is 12310021. The reversal of 12310020 is 2001321.

It is a happy number.

12310020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12310019) and next prime (12310021).

It can be written as a sum of positive squares in 2 ways, for example, as 7354944 + 4955076 = 2712^2 + 2226^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12309984 and 12310011.

It is not an unprimeable number, because it can be changed into a prime (12310021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34015 + ... + 34374.

Almost surely, 2^12310020 is an apocalyptic number.

12310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12310020 is an abundant number, since it is smaller than the sum of its proper divisors (25030920).

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

12310020 is a wasteful number, since it uses less digits than its factorization.

12310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68404 (or 68399 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 12310020 is about 3508.5638087400. The cubic root of 12310020 is about 230.8976889930.

Adding to 12310020 its reverse (2001321), we get a palindrome (14311341).

The spelling of 12310020 in words is "twelve million, three hundred ten thousand, twenty".