18417717343423 has 4 divisors (see below), whose sum is σ = 18445580759128. Its totient is φ = 18389853927720.

The previous prime is 18417717343381. The next prime is 18417717343427. The reversal of 18417717343423 is 32434371771481.

It is a happy number.

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 18417717343423 - 2²⁵ = 18417683788991 is a prime.

It is a super-3 number, since 3×18417717343423³ (a number of 41 digits) contains 333 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 (18417717343427) 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, 13931706861 + ... + 13931708182.

It is an arithmetic number, because the mean of its divisors is an integer number (4611395189782).

Almost surely, 2^{18417717343423} is an apocalyptic number.

18417717343423 is a deficient number, since it is larger than the sum of its proper divisors (27863415705).

18417717343423 is an equidigital number, since it uses as much as digits as its factorization.

18417717343423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27863415704.

The product of its digits is 9483264, while the sum is 55.

The spelling of 18417717343423 in words is "eighteen trillion, four hundred seventeen billion, seven hundred seventeen million, three hundred forty-three thousand, four hundred twenty-three".