20221000200 has 144 divisors (see below), whose sum is σ = 71903606580. Its totient is φ = 5075066880.

The previous prime is 20221000171. The next prime is 20221000231. The reversal of 20221000200 is 200012202.

It can be written as a sum of positive squares in 6 ways, for example, as 4449156804 + 15771843396 = 66702^2 + 125586^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 299809 + ... + 361008.

Almost surely, 2^20221000200 is an apocalyptic number.

20221000200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221000200 is an abundant number, since it is smaller than the sum of its proper divisors (51682606380).

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

20221000200 is a wasteful number, since it uses less digits than its factorization.

20221000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660856 (or 660844 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20221000200 its reverse (200012202), we get a palindrome (20421012402).

The spelling of 20221000200 in words is "twenty billion, two hundred twenty-one million, two hundred", and thus it is an aban number.