19448605440 has 360 divisors, whose sum is σ = 75921542928. Its totient is φ = 4714536960.

The previous prime is 19448605427. The next prime is 19448605481. The reversal of 19448605440 is 4450684491.

19448605440 is a `hidden beast` number, since 1 + 9 + 4 + 48 + 60 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1131954 + ... + 1149006.

Almost surely, 2^19448605440 is an apocalyptic number.

19448605440 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 19448605440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37960771464).

19448605440 is an abundant number, since it is smaller than the sum of its proper divisors (56472937488).

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

19448605440 is a wasteful number, since it uses less digits than its factorization.

19448605440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17097 (or 17074 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 19448605440 in words is "nineteen billion, four hundred forty-eight million, six hundred five thousand, four hundred forty".