18745534773504 has 432 divisors, whose sum is σ = 67398020936064. Its totient is φ = 4867994419200.

The previous prime is 18745534773481. The next prime is 18745534773521. The reversal of 18745534773504 is 40537743554781.

18745534773504 is a `hidden beast` number, since 1 + 8 + 7 + 4 + 5 + 53 + 4 + 7 + 73 + 504 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1428660064 + ... + 1428673184.

It is an arithmetic number, because the mean of its divisors is an integer number (156013937352).

Almost surely, 2^{18745534773504} is an apocalyptic number.

18745534773504 is a gapful number since it is divisible by the number (14) 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 18745534773504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33699010468032).

18745534773504 is an abundant number, since it is smaller than the sum of its proper divisors (48652486162560).

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

18745534773504 is a wasteful number, since it uses less digits than its factorization.

18745534773504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21214 (or 21197 counting only the distinct ones).

The product of its (nonzero) digits is 197568000, while the sum is 63.

The spelling of 18745534773504 in words is "eighteen trillion, seven hundred forty-five billion, five hundred thirty-four million, seven hundred seventy-three thousand, five hundred four".