19217881152 has 140 divisors (see below), whose sum is σ = 57902671596. Its totient is φ = 6300840960.

The previous prime is 19217881139. The next prime is 19217881157. The reversal of 19217881152 is 25118871291.

It can be written as a sum of positive squares in 2 ways, for example, as 7677965376 + 11539915776 = 87624^2 + 107424^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19217881098 and 19217881107.

It is not an unprimeable number, because it can be changed into a prime (19217881157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 285838 + ... + 346610.

Almost surely, 2^19217881152 is an apocalyptic number.

19217881152 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 19217881152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28951335798).

19217881152 is an abundant number, since it is smaller than the sum of its proper divisors (38684790444).

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

19217881152 is an equidigital number, since it uses as much as digits as its factorization.

19217881152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60858 (or 60839 counting only the distinct ones).

The product of its digits is 80640, while the sum is 45.

The spelling of 19217881152 in words is "nineteen billion, two hundred seventeen million, eight hundred eighty-one thousand, one hundred fifty-two".