1980001800020 has 24 divisors (see below), whose sum is σ = 4158413338464. Its totient is φ = 791922708896.

The previous prime is 1980001799987. The next prime is 1980001800151. The reversal of 1980001800020 is 200081000891.

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, 4667354 + ... + 5073873.

It is an arithmetic number, because the mean of its divisors is an integer number (173267222436).

Almost surely, 2^{1980001800020} is an apocalyptic number.

1980001800020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980001800020 is an abundant number, since it is smaller than the sum of its proper divisors (2178411538444).

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

1980001800020 is a wasteful number, since it uses less digits than its factorization.

1980001800020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751399 (or 9751397 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 1980001800020 in words is "one trillion, nine hundred eighty billion, one million, eight hundred thousand, twenty".