19960686 has 96 divisors (see below), whose sum is σ = 49297248. Its totient is φ = 5806080.

The previous prime is 19960673. The next prime is 19960687. The reversal of 19960686 is 68606991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19960687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 464181 + ... + 464223.

It is an arithmetic number, because the mean of its divisors is an integer number (513513).

Almost surely, 2^19960686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19960686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24648624).

19960686 is an abundant number, since it is smaller than the sum of its proper divisors (29336562).

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

19960686 is a wasteful number, since it uses less digits than its factorization.

19960686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 19960686 is about 4467.7383540221. The cubic root of 19960686 is about 271.2637873035.

The spelling of 19960686 in words is "nineteen million, nine hundred sixty thousand, six hundred eighty-six".