1818363838220 has 48 divisors (see below), whose sum is σ = 3833387970048. Its totient is φ = 724527199680.

The previous prime is 1818363838127. The next prime is 1818363838229. The reversal of 1818363838220 is 228383638181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1818363838229) 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, 5378627 + ... + 5706693.

It is an arithmetic number, because the mean of its divisors is an integer number (79862249376).

Almost surely, 2^{1818363838220} is an apocalyptic number.

1818363838220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818363838220 is an abundant number, since it is smaller than the sum of its proper divisors (2015024131828).

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

1818363838220 is a wasteful number, since it uses less digits than its factorization.

1818363838220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329150 (or 329148 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 53.

The spelling of 1818363838220 in words is "one trillion, eight hundred eighteen billion, three hundred sixty-three million, eight hundred thirty-eight thousand, two hundred twenty".