18448647840 has 144 divisors (see below), whose sum is σ = 71949765888. Its totient is φ = 4216831488.

The previous prime is 18448647799. The next prime is 18448647853. The reversal of 18448647840 is 4874684481.

18448647840 is a `hidden beast` number, since 1 + 84 + 486 + 4 + 7 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 905032 + ... + 925191.

It is an arithmetic number, because the mean of its divisors is an integer number (499651152).

Almost surely, 2^18448647840 is an apocalyptic number.

18448647840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18448647840 is an abundant number, since it is smaller than the sum of its proper divisors (53501118048).

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

18448647840 is a wasteful number, since it uses less digits than its factorization.

18448647840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830251 (or 1830240 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 54.

The spelling of 18448647840 in words is "eighteen billion, four hundred forty-eight million, six hundred forty-seven thousand, eight hundred forty".