12002020020 has 48 divisors (see below), whose sum is σ = 37339619520. Its totient is φ = 3200538528.

The previous prime is 12002020013. The next prime is 12002020039. The reversal of 12002020020 is 2002020021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12002019984 and 12002020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11112442 + ... + 11113521.

It is an arithmetic number, because the mean of its divisors is an integer number (777908740).

Almost surely, 2^12002020020 is an apocalyptic number.

12002020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12002020020 is an abundant number, since it is smaller than the sum of its proper divisors (25337599500).

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

12002020020 is a wasteful number, since it uses less digits than its factorization.

12002020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22225981 (or 22225973 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 12002020020 its reverse (2002020021), we get a palindrome (14004040041).

Subtracting from 12002020020 its reverse (2002020021), we obtain a palindrome (9999999999).

The spelling of 12002020020 in words is "twelve billion, two million, twenty thousand, twenty".