200021320 has 32 divisors (see below), whose sum is σ = 476523000. Its totient is φ = 75301888.

The previous prime is 200021293. The next prime is 200021333. The reversal of 200021320 is 23120002.

It can be written as a sum of positive squares in 4 ways, for example, as 116079076 + 83942244 = 10774^2 + 9162^2 .

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 = 200021297 and 200021306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146395 + ... + 147754.

Almost surely, 2^200021320 is an apocalyptic number.

200021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200021320 is an abundant number, since it is smaller than the sum of its proper divisors (276501680).

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

200021320 is a wasteful number, since it uses less digits than its factorization.

200021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294177 (or 294173 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 200021320 is about 14142.8893794726. The cubic root of 200021320 is about 584.8243269236.

Adding to 200021320 its reverse (23120002), we get a palindrome (223141322).

The spelling of 200021320 in words is "two hundred million, twenty-one thousand, three hundred twenty".