18689089536 has 672 divisors, whose sum is σ = 65263580928. Its totient is φ = 5096079360.

The previous prime is 18689089481. The next prime is 18689089547. The reversal of 18689089536 is 63598098681.

18689089536 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 90 + 8 + 9 + 536 = 666.

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 47 ways as a sum of consecutive naturals, for example, 505110510 + ... + 505110546.

It is an arithmetic number, because the mean of its divisors is an integer number (97118424).

Almost surely, 2^18689089536 is an apocalyptic number.

18689089536 is a gapful number since it is divisible by the number (16) 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 18689089536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32631790464).

18689089536 is an abundant number, since it is smaller than the sum of its proper divisors (46574491392).

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

18689089536 is a wasteful number, since it uses less digits than its factorization.

18689089536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 18689089536 in words is "eighteen billion, six hundred eighty-nine million, eighty-nine thousand, five hundred thirty-six".