19812623719208 has 128 divisors (see below), whose sum is σ = 41801830272000. Its totient is φ = 8759632896000.

The previous prime is 19812623719199. The next prime is 19812623719451. The reversal of 19812623719208 is 80291732621891.

It is a super-3 number, since 3×19812623719208³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128508728 + ... + 128662808.

It is an arithmetic number, because the mean of its divisors is an integer number (326576799000).

Almost surely, 2^{19812623719208} is an apocalyptic number.

It is an amenable number.

19812623719208 is an abundant number, since it is smaller than the sum of its proper divisors (21989206552792).

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

19812623719208 is a wasteful number, since it uses less digits than its factorization.

19812623719208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155107 (or 155103 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 19812623719208 in words is "nineteen trillion, eight hundred twelve billion, six hundred twenty-three million, seven hundred nineteen thousand, two hundred eight".