18489511040 has 1024 divisors, whose sum is σ = 65802240000. Its totient is φ = 4877107200.

The previous prime is 18489511039. The next prime is 18489511057. The reversal of 18489511040 is 4011598481.

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 127 ways as a sum of consecutive naturals, for example, 596435825 + ... + 596435855.

It is an arithmetic number, because the mean of its divisors is an integer number (64260000).

Almost surely, 2^18489511040 is an apocalyptic number.

18489511040 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 18489511040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32901120000).

18489511040 is an abundant number, since it is smaller than the sum of its proper divisors (47312728960).

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

18489511040 is a wasteful number, since it uses less digits than its factorization.

18489511040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 18489511040 in words is "eighteen billion, four hundred eighty-nine million, five hundred eleven thousand, forty".