19685188483974 has 128 divisors (see below), whose sum is σ = 48321442646400. Its totient is φ = 5903027228160.

The previous prime is 19685188483951. The next prime is 19685188484023. The reversal of 19685188483974 is 47938488158691.

19685188483974 is a `hidden beast` number, since 1 + 9 + 6 + 8 + 5 + 188 + 48 + 397 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 19685188483893 and 19685188483902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2558892 + ... + 6776304.

It is an arithmetic number, because the mean of its divisors is an integer number (377511270675).

Almost surely, 2^{19685188483974} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19685188483974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24160721323200).

19685188483974 is an abundant number, since it is smaller than the sum of its proper divisors (28636254162426).

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

19685188483974 is a wasteful number, since it uses less digits than its factorization.

19685188483974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217607 (or 4217601 counting only the distinct ones).

The product of its digits is 3344302080, while the sum is 81.

The spelling of 19685188483974 in words is "nineteen trillion, six hundred eighty-five billion, one hundred eighty-eight million, four hundred eighty-three thousand, nine hundred seventy-four".