18257393784000 has 896 divisors, whose sum is σ = 70989978009600. Its totient is φ = 4048200499200.

The previous prime is 18257393783987. The next prime is 18257393784037. The reversal of 18257393784000 is 48739375281.

It is a super-4 number, since 4×18257393784000⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 792444481 + ... + 792467519.

Almost surely, 2^{18257393784000} is an apocalyptic number.

18257393784000 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 18257393784000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35494989004800).

18257393784000 is an abundant number, since it is smaller than the sum of its proper divisors (52732584225600).

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

18257393784000 is a wasteful number, since it uses less digits than its factorization.

18257393784000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23218 (or 23198 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 18257393784000 in words is "eighteen trillion, two hundred fifty-seven billion, three hundred ninety-three million, seven hundred eighty-four thousand".