18393479719 has 8 divisors (see below), whose sum is σ = 18580592160. Its totient is φ = 18206531616.

The previous prime is 18393479717. The next prime is 18393479729. The reversal of 18393479719 is 91797439381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18393479719 - 2¹ = 18393479717 is a prime.

It is a super-2 number, since 2×18393479719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18393479717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190497 + ... + 270325.

It is an arithmetic number, because the mean of its divisors is an integer number (2322574020).

Almost surely, 2^18393479719 is an apocalyptic number.

18393479719 is a deficient number, since it is larger than the sum of its proper divisors (187112441).

18393479719 is a wasteful number, since it uses less digits than its factorization.

18393479719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82169.

The product of its digits is 10287648, while the sum is 61.

The spelling of 18393479719 in words is "eighteen billion, three hundred ninety-three million, four hundred seventy-nine thousand, seven hundred nineteen".