18019820017 has 2 divisors, whose sum is σ = 18019820018. Its totient is φ = 18019820016.

The previous prime is 18019820003. The next prime is 18019820023. The reversal of 18019820017 is 71002891081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17838540721 + 181279296 = 133561^2 + 13464^2 .

It is a cyclic number.

It is not a de Polignac number, because 18019820017 - 2²³ = 18011431409 is a prime.

It is not a weakly prime, because it can be changed into another prime (18019820047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9009910008 + 9009910009.

It is an arithmetic number, because the mean of its divisors is an integer number (9009910009).

Almost surely, 2^18019820017 is an apocalyptic number.

It is an amenable number.

18019820017 is a deficient number, since it is larger than the sum of its proper divisors (1).

18019820017 is an equidigital number, since it uses as much as digits as its factorization.

18019820017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 37.

The spelling of 18019820017 in words is "eighteen billion, nineteen million, eight hundred twenty thousand, seventeen".