19019713440 has 576 divisors, whose sum is σ = 75626659584. Its totient is φ = 3912302592.

The previous prime is 19019713429. The next prime is 19019713451. The reversal of 19019713440 is 4431791091.

It is an interprime number because it is at equal distance from previous prime (19019713429) and next prime (19019713451).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 196079472 + ... + 196079568.

It is an arithmetic number, because the mean of its divisors is an integer number (131296284).

Almost surely, 2^19019713440 is an apocalyptic number.

19019713440 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 19019713440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37813329792).

19019713440 is an abundant number, since it is smaller than the sum of its proper divisors (56606946144).

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

19019713440 is a wasteful number, since it uses less digits than its factorization.

19019713440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 19019713440 in words is "nineteen billion, nineteen million, seven hundred thirteen thousand, four hundred forty".