19894660206168 has 128 divisors (see below), whose sum is σ = 57256291411200. Its totient is φ = 5697142272000.

The previous prime is 19894660206131. The next prime is 19894660206181. The reversal of 19894660206168 is 86160206649891.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 19894660206099 and 19894660206108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2934021 + ... + 6956852.

It is an arithmetic number, because the mean of its divisors is an integer number (447314776650).

Almost surely, 2^{19894660206168} is an apocalyptic number.

It is an amenable number.

19894660206168 is an abundant number, since it is smaller than the sum of its proper divisors (37361631205032).

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

19894660206168 is a wasteful number, since it uses less digits than its factorization.

19894660206168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9891313 (or 9891309 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 66.

The spelling of 19894660206168 in words is "nineteen trillion, eight hundred ninety-four billion, six hundred sixty million, two hundred six thousand, one hundred sixty-eight".