19225440000 has 810 divisors, whose sum is σ = 75954999120. Its totient is φ = 4672512000.

The previous prime is 19225439999. The next prime is 19225440001. The reversal of 19225440000 is 4452291.

19225440000 is a `hidden beast` number, since 1 + 9 + 2 + 254 + 400 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (19225439999) and next prime (19225440001).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19225440001) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 243359961 + ... + 243360039.

Almost surely, 2^19225440000 is an apocalyptic number.

19225440000 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 19225440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37977499560).

19225440000 is an abundant number, since it is smaller than the sum of its proper divisors (56729559120).

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

19225440000 is an equidigital number, since it uses as much as digits as its factorization.

19225440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 19225440000 its reverse (4452291), we get a palindrome (19229892291).

The spelling of 19225440000 in words is "nineteen billion, two hundred twenty-five million, four hundred forty thousand".