18875773728 has 216 divisors, whose sum is σ = 63324555840. Its totient is φ = 5316837120.

The previous prime is 18875773723. The next prime is 18875773747. The reversal of 18875773728 is 82737757881.

18875773728 is a `hidden beast` number, since 1 + 8 + 8 + 7 + 577 + 37 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18875773723) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 992533 + ... + 1011371.

It is an arithmetic number, because the mean of its divisors is an integer number (293169240).

Almost surely, 2^18875773728 is an apocalyptic number.

18875773728 is a gapful number since it is divisible by the number (18) 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 18875773728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31662277920).

18875773728 is an abundant number, since it is smaller than the sum of its proper divisors (44448782112).

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

18875773728 is a wasteful number, since it uses less digits than its factorization.

18875773728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18940 (or 18922 counting only the distinct ones).

The product of its digits is 36879360, while the sum is 63.

The spelling of 18875773728 in words is "eighteen billion, eight hundred seventy-five million, seven hundred seventy-three thousand, seven hundred twenty-eight".