18369538560 has 320 divisors, whose sum is σ = 67362831360. Its totient is φ = 4739973120.

The previous prime is 18369538543. The next prime is 18369538567. The reversal of 18369538560 is 6583596381.

18369538560 is a `hidden beast` number, since 18 + 3 + 69 + 5 + 3 + 8 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is a junction number, because it is equal to n+sod(n) for n = 18369538497 and 18369538506.

It is not an unprimeable number, because it can be changed into a prime (18369538567) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2138434 + ... + 2147006.

It is an arithmetic number, because the mean of its divisors is an integer number (210508848).

Almost surely, 2^18369538560 is an apocalyptic number.

18369538560 is a gapful number since it is divisible by the number (10) 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 18369538560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33681415680).

18369538560 is an abundant number, since it is smaller than the sum of its proper divisors (48993292800).

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

18369538560 is an equidigital number, since it uses as much as digits as its factorization.

18369538560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636 (or 8614 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 18369538560 in words is "eighteen billion, three hundred sixty-nine million, five hundred thirty-eight thousand, five hundred sixty".