19800180018036 has 48 divisors (see below), whose sum is σ = 56000509145280. Its totient is φ = 6000054550560.

The previous prime is 19800180018007. The next prime is 19800180018041. The reversal of 19800180018036 is 63081008100891.

It is a junction number, because it is equal to n+sod(n) for n = 19800180017982 and 19800180018000.

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, 8333407911 + ... + 8333410286.

It is an arithmetic number, because the mean of its divisors is an integer number (1166677273860).

Almost surely, 2^{19800180018036} is an apocalyptic number.

It is an amenable number.

19800180018036 is an abundant number, since it is smaller than the sum of its proper divisors (36200329127244).

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

19800180018036 is a wasteful number, since it uses less digits than its factorization.

19800180018036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666818221 (or 16666818213 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 19800180018036 in words is "nineteen trillion, eight hundred billion, one hundred eighty million, eighteen thousand, thirty-six".