18664905168 has 600 divisors, whose sum is σ = 70689725568. Its totient is φ = 4703795712.

The previous prime is 18664905157. The next prime is 18664905173. The reversal of 18664905168 is 86150946681.

18664905168 is a `hidden beast` number, since 1 + 86 + 6 + 49 + 0 + 516 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 18987205 + ... + 18988187.

Almost surely, 2^18664905168 is an apocalyptic number.

18664905168 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 18664905168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35344862784).

18664905168 is an abundant number, since it is smaller than the sum of its proper divisors (52024820400).

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

18664905168 is a wasteful number, since it uses less digits than its factorization.

18664905168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 18664905168 in words is "eighteen billion, six hundred sixty-four million, nine hundred five thousand, one hundred sixty-eight".