18268449367 has 4 divisors (see below), whose sum is σ = 20878227856. Its totient is φ = 15658670880.

The previous prime is 18268449349. The next prime is 18268449371. The reversal of 18268449367 is 76394486281.

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 18268449367 - 2¹⁵ = 18268416599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268249367) 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, 1304889234 + ... + 1304889247.

It is an arithmetic number, because the mean of its divisors is an integer number (5219556964).

Almost surely, 2^18268449367 is an apocalyptic number.

18268449367 is a deficient number, since it is larger than the sum of its proper divisors (2609778489).

18268449367 is an equidigital number, since it uses as much as digits as its factorization.

18268449367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609778488.

The product of its digits is 13934592, while the sum is 58.

The spelling of 18268449367 in words is "eighteen billion, two hundred sixty-eight million, four hundred forty-nine thousand, three hundred sixty-seven".