19666925690880 has 448 divisors, whose sum is σ = 68405084350848. Its totient is φ = 4795803893760.

The previous prime is 19666925690837. The next prime is 19666925690887. The reversal of 19666925690880 is 8809652966691.

It is a super-2 number, since 2×19666925690880² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19666925690887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170868550 + ... + 170983610.

It is an arithmetic number, because the mean of its divisors is an integer number (152689920426).

Almost surely, 2^{19666925690880} is an apocalyptic number.

19666925690880 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 19666925690880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34202542175424).

19666925690880 is an abundant number, since it is smaller than the sum of its proper divisors (48738158659968).

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

19666925690880 is a wasteful number, since it uses less digits than its factorization.

19666925690880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115215 (or 115191 counting only the distinct ones).

The product of its (nonzero) digits is 604661760, while the sum is 75.

The spelling of 19666925690880 in words is "nineteen trillion, six hundred sixty-six billion, nine hundred twenty-five million, six hundred ninety thousand, eight hundred eighty".