18661714923852 has 576 divisors, whose sum is σ = 67112138096640. Its totient is φ = 4210750656000.

The previous prime is 18661714923851. The next prime is 18661714923853. The reversal of 18661714923852 is 25832941716681.

It is a happy number.

18661714923852 is a `hidden beast` number, since 1 + 8 + 6 + 61 + 7 + 1 + 492 + 3 + 85 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (18661714923851) and next prime (18661714923853).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 18661714923852.

It is not an unprimeable number, because it can be changed into a prime (18661714923851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 103297033 + ... + 103477535.

It is an arithmetic number, because the mean of its divisors is an integer number (116514128640).

Almost surely, 2^{18661714923852} is an apocalyptic number.

18661714923852 is a gapful number since it is divisible by the number (12) 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 18661714923852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33556069048320).

18661714923852 is an abundant number, since it is smaller than the sum of its proper divisors (48450423172788).

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

18661714923852 is a wasteful number, since it uses less digits than its factorization.

18661714923852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180714 (or 180709 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 18661714923852 in words is "eighteen trillion, six hundred sixty-one billion, seven hundred fourteen million, nine hundred twenty-three thousand, eight hundred fifty-two".