18718744670340 has 192 divisors, whose sum is σ = 61581987597312. Its totient is φ = 4188369139200.

The previous prime is 18718744670333. The next prime is 18718744670341. The reversal of 18718744670340 is 4307644781781.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (18718744670341) 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 63 ways as a sum of consecutive naturals, for example, 85098139 + ... + 85317821.

It is an arithmetic number, because the mean of its divisors is an integer number (320739518736).

Almost surely, 2^{18718744670340} is an apocalyptic number.

18718744670340 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 18718744670340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30790993798656).

18718744670340 is an abundant number, since it is smaller than the sum of its proper divisors (42863242926972).

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

18718744670340 is a wasteful number, since it uses less digits than its factorization.

18718744670340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229650 (or 229648 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 60.

The spelling of 18718744670340 in words is "eighteen trillion, seven hundred eighteen billion, seven hundred forty-four million, six hundred seventy thousand, three hundred forty".