20211020200 has 144 divisors (see below), whose sum is σ = 55560311100. Its totient is φ = 6815692800.

The previous prime is 20211020189. The next prime is 20211020279. The reversal of 20211020200 is 202011202.

It can be written as a sum of positive squares in 6 ways, for example, as 2681789796 + 17529230404 = 51786^2 + 132398^2 .

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

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 580896 + ... + 614704.

Almost surely, 2^20211020200 is an apocalyptic number.

20211020200 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 20211020200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27780155550).

20211020200 is an abundant number, since it is smaller than the sum of its proper divisors (35349290900).

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

20211020200 is a wasteful number, since it uses less digits than its factorization.

20211020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33900 (or 33884 counting only the distinct ones).

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

Adding to 20211020200 its reverse (202011202), we get a palindrome (20413031402).

The spelling of 20211020200 in words is "twenty billion, two hundred eleven million, twenty thousand, two hundred".