18670744664 has 64 divisors (see below), whose sum is σ = 41186880000. Its totient is φ = 7822638720.

The previous prime is 18670744643. The next prime is 18670744667. The reversal of 18670744664 is 46644707681.

It is a happy number.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18670744667) 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, 811187 + ... + 833885.

It is an arithmetic number, because the mean of its divisors is an integer number (643545000).

Almost surely, 2^18670744664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18670744664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20593440000).

18670744664 is an abundant number, since it is smaller than the sum of its proper divisors (22516135336).

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

18670744664 is a wasteful number, since it uses less digits than its factorization.

18670744664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23448 (or 23444 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 18670744664 in words is "eighteen billion, six hundred seventy million, seven hundred forty-four thousand, six hundred sixty-four".