19800180020 has 48 divisors (see below), whose sum is σ = 42876884736. Its totient is φ = 7675680000.

The previous prime is 19800180017. The next prime is 19800180047. The reversal of 19800180020 is 2008100891.

It is a congruent number.

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, 43865 + ... + 203775.

It is an arithmetic number, because the mean of its divisors is an integer number (893268432).

Almost surely, 2^19800180020 is an apocalyptic number.

19800180020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19800180020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21438442368).

19800180020 is an abundant number, since it is smaller than the sum of its proper divisors (23076704716).

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

19800180020 is a wasteful number, since it uses less digits than its factorization.

19800180020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160112 (or 160110 counting only the distinct ones).

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

The spelling of 19800180020 in words is "nineteen billion, eight hundred million, one hundred eighty thousand, twenty".