18007394495040 has 168 divisors, whose sum is σ = 64073725106040. Its totient is φ = 4636386607104.

The previous prime is 18007394494963. The next prime is 18007394495063. The reversal of 18007394495040 is 4059449370081.

18007394495040 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 7 + 3 + 94 + 49 + 504 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1696329114624 + 16311065380416 = 1302432^2 + 4038696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107719369 + ... + 107886408.

Almost surely, 2^{18007394495040} is an apocalyptic number.

18007394495040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18007394495040 is an abundant number, since it is smaller than the sum of its proper divisors (46066330611000).

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

18007394495040 is a wasteful number, since it uses less digits than its factorization.

18007394495040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215605829 (or 215605816 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 18007394495040 in words is "eighteen trillion, seven billion, three hundred ninety-four million, four hundred ninety-five thousand, forty".