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19172037373993 = 72391266068857
BaseRepresentation
bin1000101101111110101100…
…11110100011000000101001
32111212211101020201012000001
410112333112132203000221
510003103313031431433
6104435302401343001
74016063646562600
oct426772636430051
974784336635001
1019172037373993
1161218a7313579
122197804637a61
13a90bb90a3b1a
144a3d082b4a37
15233a96c6157d
hex116fd67a3029

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".

Divisors: 1 7 49 391266068857 2738862481999 19172037373993