18644743945008 has 60 divisors (see below), whose sum is σ = 55248763314888. Its totient is φ = 5849331432960.

The previous prime is 18644743944989. The next prime is 18644743945021. The reversal of 18644743945008 is 80054934744681.

18644743945008 is a `hidden beast` number, since 1 + 86 + 4 + 4 + 7 + 43 + 9 + 4 + 500 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3808156038 + ... + 3808160933.

Almost surely, 2^{18644743945008} is an apocalyptic number.

18644743945008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18644743945008 is an abundant number, since it is smaller than the sum of its proper divisors (36604019369880).

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

18644743945008 is a wasteful number, since it uses less digits than its factorization.

18644743945008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616317002 (or 7616316993 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 63.

The spelling of 18644743945008 in words is "eighteen trillion, six hundred forty-four billion, seven hundred forty-three million, nine hundred forty-five thousand, eight".