12000000020 has 12 divisors (see below), whose sum is σ = 25200000084. Its totient is φ = 4800000000.

The previous prime is 11999999983. The next prime is 12000000073. The reversal of 12000000020 is 2000000021.

It can be written as a sum of positive squares in 2 ways, for example, as 1526933776 + 10473066244 = 39076^2 + 102338^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 11999999950 and 12000000013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299999981 + ... + 300000020.

It is an arithmetic number, because the mean of its divisors is an integer number (2100000007).

Almost surely, 2^12000000020 is an apocalyptic number.

12000000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12000000020 is an abundant number, since it is smaller than the sum of its proper divisors (13200000064).

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

12000000020 is a wasteful number, since it uses less digits than its factorization.

12000000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600000010 (or 600000008 counting only the distinct ones).

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

Adding to 12000000020 its reverse (2000000021), we get a palindrome (14000000041).

Subtracting from 12000000020 its reverse (2000000021), we obtain a palindrome (9999999999).

The spelling of 12000000020 in words is "twelve billion, twenty", and thus it is an aban number and an uban number.