18487647306 has 64 divisors (see below), whose sum is σ = 41995468800. Its totient is φ = 6026015088.

The previous prime is 18487647301. The next prime is 18487647317. The reversal of 18487647306 is 60374678481.

It is a super-2 number, since 2×18487647306² (a number of 21 digits) contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18487647301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3609015 + ... + 3614133.

It is an arithmetic number, because the mean of its divisors is an integer number (656179200).

Almost surely, 2^18487647306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18487647306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20997734400).

18487647306 is an abundant number, since it is smaller than the sum of its proper divisors (23507821494).

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

18487647306 is a wasteful number, since it uses less digits than its factorization.

18487647306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600 (or 6594 counting only the distinct ones).

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

The spelling of 18487647306 in words is "eighteen billion, four hundred eighty-seven million, six hundred forty-seven thousand, three hundred six".