12020000000 has 144 divisors (see below), whose sum is σ = 30041134032. Its totient is φ = 4800000000.

The previous prime is 12019999933. The next prime is 12020000017. The reversal of 12020000000 is 2021.

It can be written as a sum of positive squares in 8 ways, for example, as 10906042624 + 1113957376 = 104432^2 + 33376^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

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, 19999700 + ... + 20000300.

Almost surely, 2^12020000000 is an apocalyptic number.

12020000000 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 12020000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15020567016).

12020000000 is an abundant number, since it is smaller than the sum of its proper divisors (18021134032).

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

12020000000 is an frugal number, since it uses more digits than its factorization.

12020000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

Adding to 12020000000 its reverse (2021), we get a palindrome (12020002021).

The spelling of 12020000000 in words is "twelve billion, twenty million", and thus it is an aban number and an uban number.