19085947088 has 80 divisors (see below), whose sum is σ = 40372572240. Its totient is φ = 8688218112.

The previous prime is 19085947081. The next prime is 19085947099. The reversal of 19085947088 is 88074958091.

It can be written as a sum of positive squares in 8 ways, for example, as 6696476224 + 12389470864 = 81832^2 + 111308^2 .

It is a super-3 number, since 3×19085947088³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19085947081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5280770 + ... + 5284382.

It is an arithmetic number, because the mean of its divisors is an integer number (504657153).

Almost surely, 2^19085947088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19085947088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20186286120).

19085947088 is an abundant number, since it is smaller than the sum of its proper divisors (21286625152).

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

19085947088 is a wasteful number, since it uses less digits than its factorization.

19085947088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976 (or 3970 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 59.

The spelling of 19085947088 in words is "nineteen billion, eighty-five million, nine hundred forty-seven thousand, eighty-eight".