18428326547 has 4 divisors (see below), whose sum is σ = 19229558160. Its totient is φ = 17627094936.

The previous prime is 18428326531. The next prime is 18428326549. The reversal of 18428326547 is 74562382481.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18428326547 - 2⁴ = 18428326531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18428326495 and 18428326504.

It is not an unprimeable number, because it can be changed into a prime (18428326549) 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, 400615772 + ... + 400615817.

It is an arithmetic number, because the mean of its divisors is an integer number (4807389540).

Almost surely, 2^18428326547 is an apocalyptic number.

18428326547 is a deficient number, since it is larger than the sum of its proper divisors (801231613).

18428326547 is an equidigital number, since it uses as much as digits as its factorization.

18428326547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801231612.

The product of its digits is 2580480, while the sum is 50.

The spelling of 18428326547 in words is "eighteen billion, four hundred twenty-eight million, three hundred twenty-six thousand, five hundred forty-seven".