18637275043680 has 192 divisors, whose sum is σ = 59666337194688. Its totient is φ = 4889388441600.

The previous prime is 18637275043669. The next prime is 18637275043693. The reversal of 18637275043680 is 8634057273681.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6387054 + ... + 8835666.

It is an arithmetic number, because the mean of its divisors is an integer number (310762172889).

Almost surely, 2^{18637275043680} is an apocalyptic number.

18637275043680 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 18637275043680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29833168597344).

18637275043680 is an abundant number, since it is smaller than the sum of its proper divisors (41029062151008).

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

18637275043680 is a wasteful number, since it uses less digits than its factorization.

18637275043680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448889 (or 2448881 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 18637275043680 in words is "eighteen trillion, six hundred thirty-seven billion, two hundred seventy-five million, forty-three thousand, six hundred eighty".