18344520244464 has 40 divisors (see below), whose sum is σ = 47391647073792. Its totient is φ = 6114628927680.

The previous prime is 18344520244439. The next prime is 18344520244529. The reversal of 18344520244464 is 46444202544381.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5190942 + ... + 7977149.

Almost surely, 2^{18344520244464} is an apocalyptic number.

It is an amenable number.

18344520244464 is an abundant number, since it is smaller than the sum of its proper divisors (29047126829328).

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

18344520244464 is a wasteful number, since it uses less digits than its factorization.

18344520244464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13197125 (or 13197119 counting only the distinct ones).

The product of its (nonzero) digits is 11796480, while the sum is 51.

The spelling of 18344520244464 in words is "eighteen trillion, three hundred forty-four billion, five hundred twenty million, two hundred forty-four thousand, four hundred sixty-four".