12020320420 has 48 divisors (see below), whose sum is σ = 25774519680. Its totient is φ = 4707876096.

The previous prime is 12020320409. The next prime is 12020320423. The reversal of 12020320420 is 2402302021.

It is a junction number, because it is equal to n+sod(n) for n = 12020320394 and 12020320403.

It is not an unprimeable number, because it can be changed into a prime (12020320423) 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, 150559 + ... + 216121.

It is an arithmetic number, because the mean of its divisors is an integer number (536969160).

Almost surely, 2^12020320420 is an apocalyptic number.

12020320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020320420 is an abundant number, since it is smaller than the sum of its proper divisors (13754199260).

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

12020320420 is a wasteful number, since it uses less digits than its factorization.

12020320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65764 (or 65762 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 12020320420 its reverse (2402302021), we get a palindrome (14422622441).

The spelling of 12020320420 in words is "twelve billion, twenty million, three hundred twenty thousand, four hundred twenty".