20202020020 has 144 divisors (see below), whose sum is σ = 54313580160. Its totient is φ = 6172927488.

The previous prime is 20202019993. The next prime is 20202020053. The reversal of 20202020020 is 2002020202.

It is a super-3 number, since 3×20202020020³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20202019979 and 20202020006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671419 + ... + 700861.

It is an arithmetic number, because the mean of its divisors is an integer number (377177640).

Almost surely, 2^20202020020 is an apocalyptic number.

20202020020 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 20202020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27156790080).

20202020020 is an abundant number, since it is smaller than the sum of its proper divisors (34111560140).

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

20202020020 is a wasteful number, since it uses less digits than its factorization.

20202020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29514 (or 29499 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

Adding to 20202020020 its reverse (2002020202), we get a palindrome (22204040222).

The spelling of 20202020020 in words is "twenty billion, two hundred two million, twenty thousand, twenty".