20200020200 has 72 divisors (see below), whose sum is σ = 47439442290. Its totient is φ = 7999200000.

The previous prime is 20200020163. The next prime is 20200020257. The reversal of 20200020200 is 202000202.

It can be written as a sum of positive squares in 9 ways, for example, as 16505568676 + 3694451524 = 128474^2 + 60782^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2035250 + ... + 2045150.

Almost surely, 2^20200020200 is an apocalyptic number.

20200020200 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 20200020200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23719721145).

20200020200 is an abundant number, since it is smaller than the sum of its proper divisors (27239422090).

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

20200020200 is a wasteful number, since it uses less digits than its factorization.

20200020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10119 (or 10009 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

Adding to 20200020200 its reverse (202000202), we get a palindrome (20402020402).

20200020200 divided by its reverse (202000202) gives a square (100 = 10²).

The spelling of 20200020200 in words is "twenty billion, two hundred million, twenty thousand, two hundred".