19662217344 has 480 divisors, whose sum is σ = 73538572800. Its totient is φ = 5104788480.

The previous prime is 19662217313. The next prime is 19662217373. The reversal of 19662217344 is 44371226691.

19662217344 is a `hidden beast` number, since 1 + 9 + 6 + 622 + 17 + 3 + 4 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 19662217344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 8780577 + ... + 8782815.

It is an arithmetic number, because the mean of its divisors is an integer number (153205360).

Almost surely, 2^19662217344 is an apocalyptic number.

19662217344 is a gapful number since it is divisible by the number (14) 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 19662217344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36769286400).

19662217344 is an abundant number, since it is smaller than the sum of its proper divisors (53876355456).

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

19662217344 is a wasteful number, since it uses less digits than its factorization.

19662217344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294 (or 2262 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The spelling of 19662217344 in words is "nineteen billion, six hundred sixty-two million, two hundred seventeen thousand, three hundred forty-four".