18844422585 has 16 divisors (see below), whose sum is σ = 31737975360. Its totient is φ = 9521392320.

The previous prime is 18844422559. The next prime is 18844422589. The reversal of 18844422585 is 58522444881.

It is not a de Polignac number, because 18844422585 - 2⁶ = 18844422521 is a prime.

It is a super-2 number, since 2×18844422585² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18844422589) 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, 33060106 + ... + 33060675.

It is an arithmetic number, because the mean of its divisors is an integer number (1983623460).

Almost surely, 2^18844422585 is an apocalyptic number.

18844422585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18844422585 is a deficient number, since it is larger than the sum of its proper divisors (12893552775).

18844422585 is a wasteful number, since it uses less digits than its factorization.

18844422585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66120808.

The product of its digits is 3276800, while the sum is 51.

The spelling of 18844422585 in words is "eighteen billion, eight hundred forty-four million, four hundred twenty-two thousand, five hundred eighty-five".