19660984 has 32 divisors (see below), whose sum is σ = 42530400. Its totient is φ = 8346240.

The previous prime is 19660981. The next prime is 19660987. The reversal of 19660984 is 48906691.

It is an interprime number because it is at equal distance from previous prime (19660981) and next prime (19660987).

It is a self number, because there is not a number n which added to its sum of digits gives 19660984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19660981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4494 + ... + 7714.

It is an arithmetic number, because the mean of its divisors is an integer number (1329075).

Almost surely, 2^19660984 is an apocalyptic number.

19660984 is a gapful number since it is divisible by the number (14) 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 19660984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21265200).

19660984 is an abundant number, since it is smaller than the sum of its proper divisors (22869416).

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

19660984 is a wasteful number, since it uses less digits than its factorization.

19660984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 19660984 is about 4434.0708158531. The cubic root of 19660984 is about 269.8992948623.

The spelling of 19660984 in words is "nineteen million, six hundred sixty thousand, nine hundred eighty-four".