18444323456 has 64 divisors (see below), whose sum is σ = 40847654400. Its totient is φ = 8238136320.

The previous prime is 18444323453. The next prime is 18444323467. The reversal of 18444323456 is 65432344481.

It is a tau number, because it is divible by the number of its divisors (64).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18444323453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127196 + ... + 230363.

It is an arithmetic number, because the mean of its divisors is an integer number (638244600).

Almost surely, 2^18444323456 is an apocalyptic number.

18444323456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18444323456 is an abundant number, since it is smaller than the sum of its proper divisors (22403330944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18444323456 is a wasteful number, since it uses less digits than its factorization.

18444323456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357617 (or 357605 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 44.

The spelling of 18444323456 in words is "eighteen billion, four hundred forty-four million, three hundred twenty-three thousand, four hundred fifty-six".