1820201818200 has 48 divisors (see below), whose sum is σ = 5642625638280. Its totient is φ = 485387151360.

The previous prime is 1820201818159. The next prime is 1820201818223. The reversal of 1820201818200 is 28181020281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1516834249 + ... + 1516835448.

Almost surely, 2^{1820201818200} is an apocalyptic number.

1820201818200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820201818200 is an abundant number, since it is smaller than the sum of its proper divisors (3822423820080).

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

1820201818200 is a wasteful number, since it uses less digits than its factorization.

1820201818200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033669716 (or 3033669707 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 33.

Adding to 1820201818200 its reverse (28181020281), we get a palindrome (1848382838481).

The spelling of 1820201818200 in words is "one trillion, eight hundred twenty billion, two hundred one million, eight hundred eighteen thousand, two hundred".