18048639680 has 28 divisors (see below), whose sum is σ = 42978324000. Its totient is φ = 7219455744.

The previous prime is 18048639667. The next prime is 18048639683. The reversal of 18048639680 is 8693684081.

It is not an unprimeable number, because it can be changed into a prime (18048639683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28200680 + ... + 28201319.

Almost surely, 2^18048639680 is an apocalyptic number.

18048639680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18048639680 is an abundant number, since it is smaller than the sum of its proper divisors (24929684320).

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

18048639680 is an equidigital number, since it uses as much as digits as its factorization.

18048639680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56402016 (or 56402006 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 18048639680 in words is "eighteen billion, forty-eight million, six hundred thirty-nine thousand, six hundred eighty".