19662006528 has 144 divisors (see below), whose sum is σ = 59013223360. Its totient is φ = 6456029184.

The previous prime is 19662006491. The next prime is 19662006577. The reversal of 19662006528 is 82560026691.

19662006528 is a `hidden beast` number, since 19 + 6 + 620 + 0 + 6 + 5 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×19662006528² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441876 + ... + 484332.

Almost surely, 2^19662006528 is an apocalyptic number.

19662006528 is a gapful number since it is divisible by the number (18) 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 19662006528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29506611680).

19662006528 is an abundant number, since it is smaller than the sum of its proper divisors (39351216832).

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

19662006528 is an equidigital number, since it uses as much as digits as its factorization.

19662006528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42549 (or 42529 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 19662006528 in words is "nineteen billion, six hundred sixty-two million, six thousand, five hundred twenty-eight".