18068519719 has 4 divisors (see below), whose sum is σ = 18488717896. Its totient is φ = 17648321544.

The previous prime is 18068519713. The next prime is 18068519731. The reversal of 18068519719 is 91791586081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18068519719 - 2¹¹ = 18068517671 is a prime.

It is a super-2 number, since 2×18068519719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18068519719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18068519713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210099024 + ... + 210099109.

It is an arithmetic number, because the mean of its divisors is an integer number (4622179474).

Almost surely, 2^18068519719 is an apocalyptic number.

18068519719 is a deficient number, since it is larger than the sum of its proper divisors (420198177).

18068519719 is an equidigital number, since it uses as much as digits as its factorization.

18068519719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420198176.

The product of its (nonzero) digits is 1088640, while the sum is 55.

The spelling of 18068519719 in words is "eighteen billion, sixty-eight million, five hundred nineteen thousand, seven hundred nineteen".