2001818383820 has 48 divisors (see below), whose sum is σ = 4256866268928. Its totient is φ = 790667851200.

The previous prime is 2001818383811. The next prime is 2001818383841. The reversal of 2001818383820 is 283838181002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685406 + ... + 2115045.

It is an arithmetic number, because the mean of its divisors is an integer number (88684713936).

Almost surely, 2^{2001818383820} is an apocalyptic number.

2001818383820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001818383820 is an abundant number, since it is smaller than the sum of its proper divisors (2255047885108).

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

2001818383820 is a wasteful number, since it uses less digits than its factorization.

2001818383820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800910 (or 2800908 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 2001818383820 in words is "two trillion, one billion, eight hundred eighteen million, three hundred eighty-three thousand, eight hundred twenty".