12020340 has 48 divisors (see below), whose sum is σ = 34050240. Its totient is φ = 3168000.

The previous prime is 12020311. The next prime is 12020341. The reversal of 12020340 is 4302021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4215 + ... + 6465.

It is an arithmetic number, because the mean of its divisors is an integer number (709380).

Almost surely, 2^12020340 is an apocalyptic number.

12020340 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 12020340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17025120).

12020340 is an abundant number, since it is smaller than the sum of its proper divisors (22029900).

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

12020340 is a wasteful number, since it uses less digits than its factorization.

12020340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 12020340 is about 3467.0361982535. The cubic root of 12020340 is about 229.0721282045.

Adding to 12020340 its reverse (4302021), we get a palindrome (16322361).

The spelling of 12020340 in words is "twelve million, twenty thousand, three hundred forty".