19986912 has 120 divisors (see below), whose sum is σ = 64216152. Its totient is φ = 6048000.

The previous prime is 19986893. The next prime is 19986929. The reversal of 19986912 is 21968991.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28162 + ... + 28862.

Almost surely, 2^19986912 is an apocalyptic number.

19986912 is a gapful number since it is divisible by the number (12) 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 19986912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32108076).

19986912 is an abundant number, since it is smaller than the sum of its proper divisors (44229240).

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

19986912 is a wasteful number, since it uses less digits than its factorization.

19986912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 717 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 19986912 is about 4470.6724326437. The cubic root of 19986912 is about 271.3825382427.

The spelling of 19986912 in words is "nineteen million, nine hundred eighty-six thousand, nine hundred twelve".