20011220200 has 48 divisors (see below), whose sum is σ = 49262923980. Its totient is φ = 7533634560.

The previous prime is 20011220197. The next prime is 20011220213. The reversal of 20011220200 is 202211002.

It can be written as a sum of positive squares in 6 ways, for example, as 12665701764 + 7345518436 = 112542^2 + 85706^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2939427 + ... + 2946226.

Almost surely, 2^20011220200 is an apocalyptic number.

20011220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011220200 is an abundant number, since it is smaller than the sum of its proper divisors (29251703780).

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

20011220200 is a wasteful number, since it uses less digits than its factorization.

20011220200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885686 (or 5885677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20011220200 its reverse (202211002), we get a palindrome (20213431202).

The spelling of 20011220200 in words is "twenty billion, eleven million, two hundred twenty thousand, two hundred".