18487647360 has 640 divisors, whose sum is σ = 81279475200. Its totient is φ = 3899695104.

The previous prime is 18487647317. The next prime is 18487647361. The reversal of 18487647360 is 6374678481.

18487647360 is a `hidden beast` number, since 1 + 8 + 48 + 76 + 473 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

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 = 18487647297 and 18487647306.

It is not an unprimeable number, because it can be changed into a prime (18487647361) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4715481 + ... + 4719399.

It is an arithmetic number, because the mean of its divisors is an integer number (126999180).

Almost surely, 2^18487647360 is an apocalyptic number.

18487647360 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 18487647360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40639737600).

18487647360 is an abundant number, since it is smaller than the sum of its proper divisors (62791827840).

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

18487647360 is a wasteful number, since it uses less digits than its factorization.

18487647360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970 (or 3949 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 18487647360 in words is "eighteen billion, four hundred eighty-seven million, six hundred forty-seven thousand, three hundred sixty".