3123002020 has 48 divisors (see below), whose sum is σ = 6748302960. Its totient is φ = 1213138944.

The previous prime is 3123001991. The next prime is 3123002023. The reversal of 3123002020 is 202003213.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 63584676 + 3059417344 = 7974^2 + 55312^2 .

It is not an unprimeable number, because it can be changed into a prime (3123002023) 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, 417352 + ... + 424768.

It is an arithmetic number, because the mean of its divisors is an integer number (140589645).

Almost surely, 2^3123002020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3123002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3374151480).

3123002020 is an abundant number, since it is smaller than the sum of its proper divisors (3625300940).

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

3123002020 is a wasteful number, since it uses less digits than its factorization.

3123002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8032 (or 8030 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 3123002020 is about 55883.8261038022. The cubic root of 3123002020 is about 1461.6972224683.

Adding to 3123002020 its reverse (202003213), we get a palindrome (3325005233).

The spelling of 3123002020 in words is "three billion, one hundred twenty-three million, two thousand, twenty".