19818166680 has 96 divisors (see below), whose sum is σ = 69363599760. Its totient is φ = 4878316800.

The previous prime is 19818166663. The next prime is 19818166681. The reversal of 19818166680 is 8666181891.

It is a super-3 number, since 3×19818166680³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19818166681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2112646 + ... + 2122005.

Almost surely, 2^19818166680 is an apocalyptic number.

19818166680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19818166680 is an abundant number, since it is smaller than the sum of its proper divisors (49545433080).

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

19818166680 is a wasteful number, since it uses less digits than its factorization.

19818166680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234681 (or 4234674 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 19818166680 in words is "nineteen billion, eight hundred eighteen million, one hundred sixty-six thousand, six hundred eighty".