200021620 has 12 divisors (see below), whose sum is σ = 420045444. Its totient is φ = 80008640.

The previous prime is 200021603. The next prime is 200021621. The reversal of 200021620 is 26120002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23078416 + 176943204 = 4804^2 + 13302^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 200021620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5000521 + ... + 5000560.

It is an arithmetic number, because the mean of its divisors is an integer number (35003787).

Almost surely, 2^200021620 is an apocalyptic number.

200021620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200021620 is an abundant number, since it is smaller than the sum of its proper divisors (220023824).

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

200021620 is a wasteful number, since it uses less digits than its factorization.

200021620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001090 (or 10001088 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 200021620 is about 14142.8999855051. The cubic root of 200021620 is about 584.8246193045.

Adding to 200021620 its reverse (26120002), we get a palindrome (226141622).

The spelling of 200021620 in words is "two hundred million, twenty-one thousand, six hundred twenty".