18618743159 has 4 divisors (see below), whose sum is σ = 18619029216. Its totient is φ = 18618457104.

The previous prime is 18618743141. The next prime is 18618743201. The reversal of 18618743159 is 95134781681.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95134781681 = 140053 ⋅679277.

It is a cyclic number.

It is not a de Polignac number, because 18618743159 - 2¹² = 18618739063 is a prime.

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 18618743159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18618643159) 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, 7202 + ... + 193104.

It is an arithmetic number, because the mean of its divisors is an integer number (4654757304).

Almost surely, 2^18618743159 is an apocalyptic number.

18618743159 is a deficient number, since it is larger than the sum of its proper divisors (286057).

18618743159 is a wasteful number, since it uses less digits than its factorization.

18618743159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286056.

The product of its digits is 1451520, while the sum is 53.

The spelling of 18618743159 in words is "eighteen billion, six hundred eighteen million, seven hundred forty-three thousand, one hundred fifty-nine".