1818383820220 has 24 divisors (see below), whose sum is σ = 4165752025008. Its totient is φ = 661230480000.

The previous prime is 1818383820181. The next prime is 1818383820257. The reversal of 1818383820220 is 220283838181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4132690281 + ... + 4132690720.

It is an arithmetic number, because the mean of its divisors is an integer number (173573001042).

Almost surely, 2^{1818383820220} is an apocalyptic number.

1818383820220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818383820220 is an abundant number, since it is smaller than the sum of its proper divisors (2347368204788).

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

1818383820220 is a wasteful number, since it uses less digits than its factorization.

1818383820220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265381021 (or 8265381019 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The spelling of 1818383820220 in words is "one trillion, eight hundred eighteen billion, three hundred eighty-three million, eight hundred twenty thousand, two hundred twenty".