18169244347 has 4 divisors (see below), whose sum is σ = 18284972176. Its totient is φ = 18053516520.

The previous prime is 18169244333. The next prime is 18169244351. The reversal of 18169244347 is 74344296181.

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 18169244347 - 2²⁷ = 18035026619 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 18169244347.

It is not an unprimeable number, because it can be changed into a prime (18169244147) 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, 57863679 + ... + 57863992.

It is an arithmetic number, because the mean of its divisors is an integer number (4571243044).

Almost surely, 2^18169244347 is an apocalyptic number.

18169244347 is a deficient number, since it is larger than the sum of its proper divisors (115727829).

18169244347 is a wasteful number, since it uses less digits than its factorization.

18169244347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115727828.

The product of its digits is 1161216, while the sum is 49.

The spelling of 18169244347 in words is "eighteen billion, one hundred sixty-nine million, two hundred forty-four thousand, three hundred forty-seven".