1820216200 has 96 divisors (see below), whose sum is σ = 4626891360. Its totient is φ = 660441600.

The previous prime is 1820216161. The next prime is 1820216239. The reversal of 1820216200 is 26120281.

It is an interprime number because it is at equal distance from previous prime (1820216161) and next prime (1820216239).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1942132 + ... + 1943068.

It is an arithmetic number, because the mean of its divisors is an integer number (48196785).

Almost surely, 2^1820216200 is an apocalyptic number.

1820216200 is a gapful number since it is divisible by the number (10) 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 1820216200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2313445680).

1820216200 is an abundant number, since it is smaller than the sum of its proper divisors (2806675160).

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

1820216200 is a wasteful number, since it uses less digits than its factorization.

1820216200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847 (or 1838 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1820216200 is about 42663.9918432394. The cubic root of 1820216200 is about 1220.9774930491.

Adding to 1820216200 its reverse (26120281), we get a palindrome (1846336481).

The spelling of 1820216200 in words is "one billion, eight hundred twenty million, two hundred sixteen thousand, two hundred".