18684701568 has 448 divisors, whose sum is σ = 61214732880. Its totient is φ = 5643509760.

The previous prime is 18684701557. The next prime is 18684701569. The reversal of 18684701568 is 86510748681.

It is a happy number.

18684701568 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 4 + 70 + 1 + 568 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18684701569) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 88552983 + ... + 88553193.

Almost surely, 2^18684701568 is an apocalyptic number.

18684701568 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 18684701568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30607366440).

18684701568 is an abundant number, since it is smaller than the sum of its proper divisors (42530031312).

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

18684701568 is an equidigital number, since it uses as much as digits as its factorization.

18684701568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 18684701568 in words is "eighteen billion, six hundred eighty-four million, seven hundred one thousand, five hundred sixty-eight".