200000001820 has 48 divisors (see below), whose sum is σ = 428617254240. Its totient is φ = 78363507456.

The previous prime is 200000001793. The next prime is 200000001821. The reversal of 200000001820 is 28100000002.

It is a self number, because there is not a number n which added to its sum of digits gives 200000001820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200000001821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503734 + ... + 808546.

It is an arithmetic number, because the mean of its divisors is an integer number (8929526130).

Almost surely, 2^200000001820 is an apocalyptic number.

200000001820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200000001820 is an abundant number, since it is smaller than the sum of its proper divisors (228617252420).

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

200000001820 is a wasteful number, since it uses less digits than its factorization.

200000001820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305494 (or 305492 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200000001820 its reverse (28100000002), we get a palindrome (228100001822).

The spelling of 200000001820 in words is "two hundred billion, one thousand, eight hundred twenty".