199980000020 has 12 divisors (see below), whose sum is σ = 419958000084. Its totient is φ = 79992000000.

The previous prime is 199979999993. The next prime is 199980000023. The reversal of 199980000020 is 20000089991.

199980000020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 119486366224 + 80493633796 = 345668^2 + 283714^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199980000023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4999499981 + ... + 4999500020.

It is an arithmetic number, because the mean of its divisors is an integer number (34996500007).

Almost surely, 2^199980000020 is an apocalyptic number.

199980000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199980000020 is an abundant number, since it is smaller than the sum of its proper divisors (219978000064).

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

199980000020 is a wasteful number, since it uses less digits than its factorization.

199980000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9999000010 (or 9999000008 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 199980000020 in words is "one hundred ninety-nine billion, nine hundred eighty million, twenty", and thus it is an aban number.