1820200200020 has 24 divisors (see below), whose sum is σ = 3832400646144. Its totient is φ = 726179084576.

The previous prime is 1820200199999. The next prime is 1820200200067. The reversal of 1820200200020 is 200020020281.

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, 118804364 + ... + 118819683.

It is an arithmetic number, because the mean of its divisors is an integer number (159683360256).

Almost surely, 2^{1820200200020} is an apocalyptic number.

1820200200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820200200020 is an abundant number, since it is smaller than the sum of its proper divisors (2012200446124).

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

1820200200020 is a wasteful number, since it uses less digits than its factorization.

1820200200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237624439 (or 237624437 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The spelling of 1820200200020 in words is "one trillion, eight hundred twenty billion, two hundred million, two hundred thousand, twenty".