1818200184020 has 48 divisors (see below), whose sum is σ = 4206572286336. Its totient is φ = 654617520000.

The previous prime is 1818200184019. The next prime is 1818200184029. The reversal of 1818200184020 is 204810028181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818200184029) 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, 40891376 + ... + 40935815.

It is an arithmetic number, because the mean of its divisors is an integer number (87636922632).

Almost surely, 2^{1818200184020} is an apocalyptic number.

1818200184020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818200184020 is an abundant number, since it is smaller than the sum of its proper divisors (2388372102316).

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

1818200184020 is a wasteful number, since it uses less digits than its factorization.

1818200184020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81827312 (or 81827310 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 35.

The spelling of 1818200184020 in words is "one trillion, eight hundred eighteen billion, two hundred million, one hundred eighty-four thousand, twenty".