12003020 has 48 divisors (see below), whose sum is σ = 27343008. Its totient is φ = 4408320.

The previous prime is 12003011. The next prime is 12003073. The reversal of 12003020 is 2030021.

It is a junction number, because it is equal to n+sod(n) for n = 12002989 and 12003007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14210 + ... + 15030.

It is an arithmetic number, because the mean of its divisors is an integer number (569646).

Almost surely, 2^12003020 is an apocalyptic number.

12003020 is a gapful number since it is divisible by the number (10) 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 12003020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13671504).

12003020 is an abundant number, since it is smaller than the sum of its proper divisors (15339988).

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

12003020 is a wasteful number, since it uses less digits than its factorization.

12003020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 12003020 is about 3464.5374871691. The cubic root of 12003020 is about 228.9620526609.

Adding to 12003020 its reverse (2030021), we get a palindrome (14033041).

The spelling of 12003020 in words is "twelve million, three thousand, twenty".