100020195817 has 2 divisors, whose sum is σ = 100020195818. Its totient is φ = 100020195816.

The previous prime is 100020195787. The next prime is 100020195829. The reversal of 100020195817 is 718591020001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83601361321 + 16418834496 = 289139^2 + 128136^2 .

It is an emirp because it is prime and its reverse (718591020001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100020195817 - 2⁷ = 100020195689 is a prime.

It is not a weakly prime, because it can be changed into another prime (100020195217) by changing a digit.

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 as a sum of consecutive naturals, namely, 50010097908 + 50010097909.

It is an arithmetic number, because the mean of its divisors is an integer number (50010097909).

Almost surely, 2^100020195817 is an apocalyptic number.

It is an amenable number.

100020195817 is a deficient number, since it is larger than the sum of its proper divisors (1).

100020195817 is an equidigital number, since it uses as much as digits as its factorization.

100020195817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 34.

The spelling of 100020195817 in words is "one hundred billion, twenty million, one hundred ninety-five thousand, eight hundred seventeen".