18428814247 has 4 divisors (see below), whose sum is σ = 18429111360. Its totient is φ = 18428517136.

The previous prime is 18428814223. The next prime is 18428814251. The reversal of 18428814247 is 74241882481.

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 18428814247 - 2⁷ = 18428814119 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 18428814247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428014247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16222 + ... + 192667.

It is an arithmetic number, because the mean of its divisors is an integer number (4607277840).

Almost surely, 2^18428814247 is an apocalyptic number.

18428814247 is a deficient number, since it is larger than the sum of its proper divisors (297113).

18428814247 is an equidigital number, since it uses as much as digits as its factorization.

18428814247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297112.

The product of its digits is 917504, while the sum is 49.

The spelling of 18428814247 in words is "eighteen billion, four hundred twenty-eight million, eight hundred fourteen thousand, two hundred forty-seven".