18737343640512 has 168 divisors, whose sum is σ = 64990240469856. Its totient is φ = 5038613397504.

The previous prime is 18737343640381. The next prime is 18737343640553. The reversal of 18737343640512 is 21504634373781.

18737343640512 is a `hidden beast` number, since 1 + 8 + 7 + 37 + 34 + 3 + 64 + 0 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136612593 + ... + 136749680.

Almost surely, 2^{18737343640512} is an apocalyptic number.

18737343640512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18737343640512 is an abundant number, since it is smaller than the sum of its proper divisors (46252896829344).

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

18737343640512 is a wasteful number, since it uses less digits than its factorization.

18737343640512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273362315 (or 273362302 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 18737343640512 in words is "eighteen trillion, seven hundred thirty-seven billion, three hundred forty-three million, six hundred forty thousand, five hundred twelve".