18450616847 has 16 divisors (see below), whose sum is σ = 20241134592. Its totient is φ = 16715017440.

The previous prime is 18450616841. The next prime is 18450616871. The reversal of 18450616847 is 74861605481.

It is a cyclic number.

It is not a de Polignac number, because 18450616847 - 2⁴ = 18450616831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18450616795 and 18450616804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18450616841) 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 15 ways as a sum of consecutive naturals, for example, 196958 + ... + 275124.

It is an arithmetic number, because the mean of its divisors is an integer number (1265070912).

Almost surely, 2^18450616847 is an apocalyptic number.

18450616847 is a deficient number, since it is larger than the sum of its proper divisors (1790517745).

18450616847 is a wasteful number, since it uses less digits than its factorization.

18450616847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78518.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 18450616847 in words is "eighteen billion, four hundred fifty million, six hundred sixteen thousand, eight hundred forty-seven".