2123002020 has 96 divisors (see below), whose sum is σ = 6114987648. Its totient is φ = 550029312.

The previous prime is 2123002019. The next prime is 2123002073. The reversal of 2123002020 is 202003212.

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

It is a junction number, because it is equal to n+sod(n) for n = 2123001987 and 2123002005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 506172 + ... + 510348.

It is an arithmetic number, because the mean of its divisors is an integer number (63697788).

Almost surely, 2^2123002020 is an apocalyptic number.

2123002020 is a gapful number since it is divisible by the number (20) 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 2123002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3057493824).

2123002020 is an abundant number, since it is smaller than the sum of its proper divisors (3991985628).

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

2123002020 is a wasteful number, since it uses less digits than its factorization.

2123002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429 (or 4427 counting only the distinct ones).

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

The square root of 2123002020 is about 46076.0460543220. The cubic root of 2123002020 is about 1285.2377380640.

Adding to 2123002020 its reverse (202003212), we get a palindrome (2325005232).

The spelling of 2123002020 in words is "two billion, one hundred twenty-three million, two thousand, twenty".