19085309712 has 240 divisors, whose sum is σ = 65187732480. Its totient is φ = 5094835200.

The previous prime is 19085309651. The next prime is 19085309807. The reversal of 19085309712 is 21790358091.

19085309712 is a `hidden beast` number, since 19 + 0 + 8 + 530 + 97 + 12 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 895662 + ... + 916722.

It is an arithmetic number, because the mean of its divisors is an integer number (271615552).

Almost surely, 2^19085309712 is an apocalyptic number.

19085309712 is a gapful number since it is divisible by the number (12) 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 19085309712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32593866240).

19085309712 is an abundant number, since it is smaller than the sum of its proper divisors (46102422768).

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

19085309712 is a wasteful number, since it uses less digits than its factorization.

19085309712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21142 (or 21133 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 19085309712 in words is "nineteen billion, eighty-five million, three hundred nine thousand, seven hundred twelve".