18264463668 has 144 divisors (see below), whose sum is σ = 54368496000. Its totient is φ = 5111420160.

The previous prime is 18264463631. The next prime is 18264463699. The reversal of 18264463668 is 86636446281.

18264463668 is a `hidden beast` number, since 18 + 264 + 4 + 6 + 366 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 229558 + ... + 298706.

It is an arithmetic number, because the mean of its divisors is an integer number (377559000).

Almost surely, 2^18264463668 is an apocalyptic number.

18264463668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18264463668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27184248000).

18264463668 is an abundant number, since it is smaller than the sum of its proper divisors (36104032332).

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

18264463668 is a wasteful number, since it uses less digits than its factorization.

18264463668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69222 (or 69217 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 54.

The spelling of 18264463668 in words is "eighteen billion, two hundred sixty-four million, four hundred sixty-three thousand, six hundred sixty-eight".