19662889605632 has 320 divisors, whose sum is σ = 50172819400704. Its totient is φ = 7488688619520.

The previous prime is 19662889605581. The next prime is 19662889605641. The reversal of 19662889605632 is 23650698826691.

It is a super-2 number, since 2×19662889605632² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278724668 + ... + 278795204.

Almost surely, 2^{19662889605632} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19662889605632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25086409700352).

19662889605632 is an abundant number, since it is smaller than the sum of its proper divisors (30509929795072).

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

19662889605632 is a wasteful number, since it uses less digits than its factorization.

19662889605632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70799 (or 70783 counting only the distinct ones).

The product of its (nonzero) digits is 403107840, while the sum is 71.

The spelling of 19662889605632 in words is "nineteen trillion, six hundred sixty-two billion, eight hundred eighty-nine million, six hundred five thousand, six hundred thirty-two".