19980198180036 has 108 divisors (see below), whose sum is σ = 51573915550612. Its totient is φ = 6520868499456.

The previous prime is 19980198180023. The next prime is 19980198180037. The reversal of 19980198180036 is 63008189108991.

19980198180036 is a `hidden beast` number, since 199 + 80 + 198 + 180 + 0 + 3 + 6 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 23482497600 + 19956715682436 = 153240^2 + 4467294^2 .

It is a super-2 number, since 2×19980198180036² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19980198180037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49122396 + ... + 49527468.

Almost surely, 2^{19980198180036} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19980198180036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25786957775306).

19980198180036 is an abundant number, since it is smaller than the sum of its proper divisors (31593717370576).

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

19980198180036 is a wasteful number, since it uses less digits than its factorization.

19980198180036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405430 (or 405288 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 63.

The spelling of 19980198180036 in words is "nineteen trillion, nine hundred eighty billion, one hundred ninety-eight million, one hundred eighty thousand, thirty-six".