19172037373993 has 6 divisors (see below), whose sum is σ = 22302165924906.
Its totient is φ = 16433174891952.
The previous prime is 19172037373969. The next prime is 19172037374003. The reversal of 19172037373993 is 39937373027191.
It can be written as a sum of positive squares in only one way, i.e., 11582607442329 + 7589429931664 = 3403323^2 + 2754892^2
It is not a de Polignac number, because 19172037373993 - 241 = 16973014118441 is a prime.
It is not an unprimeable number, because it can be changed into a prime (19172037373693) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195633034380 + ... + 195633034477.
It is an arithmetic number, because the mean of its divisors is an integer number (3717027654151).
Almost surely, 219172037373993 is an apocalyptic number.
It is an amenable number.
19172037373993 is a deficient number, since it is larger than the sum of its proper divisors (3130128550913).
19172037373993 is an equidigital number, since it uses as much as digits as its factorization.
19172037373993 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 391266068871 (or 391266068864 counting only the distinct ones).
The product of its (nonzero) digits is 40507614, while the sum is 64.
The spelling of 19172037373993 in words is "nineteen trillion, one hundred seventy-two billion, thirty-seven million, three hundred seventy-three thousand, nine hundred ninety-three".