18708056640 has 1512 divisors, whose sum is σ = 89044637760. Its totient is φ = 3519479808.

The previous prime is 18708056603. The next prime is 18708056663. The reversal of 18708056640 is 4665080781.

It is a happy number.

18708056640 is a `hidden beast` number, since 1 + 8 + 7 + 0 + 80 + 566 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 984634551 + ... + 984634569.

Almost surely, 2^18708056640 is an apocalyptic number.

18708056640 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 18708056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44522318880).

18708056640 is an abundant number, since it is smaller than the sum of its proper divisors (70336581120).

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

18708056640 is a wasteful number, since it uses less digits than its factorization.

18708056640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 18708056640 in words is "eighteen billion, seven hundred eight million, fifty-six thousand, six hundred forty".