18489578976 has 72 divisors (see below), whose sum is σ = 57359726424. Its totient is φ = 5602901760.

The previous prime is 18489578969. The next prime is 18489578999. The reversal of 18489578976 is 67987598481.

18489578976 is a `hidden beast` number, since 1 + 8 + 48 + 9 + 578 + 9 + 7 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2915011 + ... + 2921346.

It is an arithmetic number, because the mean of its divisors is an integer number (796662867).

Almost surely, 2^18489578976 is an apocalyptic number.

18489578976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18489578976 is an abundant number, since it is smaller than the sum of its proper divisors (38870147448).

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

18489578976 is a wasteful number, since it uses less digits than its factorization.

18489578976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836384 (or 5836373 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 72.

The spelling of 18489578976 in words is "eighteen billion, four hundred eighty-nine million, five hundred seventy-eight thousand, nine hundred seventy-six".