18385517004 has 48 divisors (see below), whose sum is σ = 43962760800. Its totient is φ = 5976732160.

The previous prime is 18385516997. The next prime is 18385517093. The reversal of 18385517004 is 40071558381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1673722 + ... + 1684670.

It is an arithmetic number, because the mean of its divisors is an integer number (915890850).

Almost surely, 2^18385517004 is an apocalyptic number.

It is an amenable number.

18385517004 is an abundant number, since it is smaller than the sum of its proper divisors (25577243796).

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

18385517004 is a wasteful number, since it uses less digits than its factorization.

18385517004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14410 (or 14408 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 18385517004 in words is "eighteen billion, three hundred eighty-five million, five hundred seventeen thousand, four".