18889798535040 has 1024 divisors, whose sum is σ = 65969941708800. Its totient is φ = 4583417118720.

The previous prime is 18889798535039. The next prime is 18889798535059. The reversal of 18889798535040 is 4053589798881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 27657098539 + ... + 27657099221.

It is an arithmetic number, because the mean of its divisors is an integer number (64423771200).

Almost surely, 2^{18889798535040} is an apocalyptic number.

18889798535040 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 18889798535040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32984970854400).

18889798535040 is an abundant number, since it is smaller than the sum of its proper divisors (47080143173760).

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

18889798535040 is a wasteful number, since it uses less digits than its factorization.

18889798535040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 696729600, while the sum is 75.

The spelling of 18889798535040 in words is "eighteen trillion, eight hundred eighty-nine billion, seven hundred ninety-eight million, five hundred thirty-five thousand, forty".