19986064 has 20 divisors (see below), whose sum is σ = 44255104. Its totient is φ = 8565408.

The previous prime is 19986061. The next prime is 19986077. The reversal of 19986064 is 46068991.

It is a self number, because there is not a number n which added to its sum of digits gives 19986064.

It is not an unprimeable number, because it can be changed into a prime (19986061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89112 + ... + 89335.

Almost surely, 2^19986064 is an apocalyptic number.

19986064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19986064 is an abundant number, since it is smaller than the sum of its proper divisors (24269040).

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

19986064 is a wasteful number, since it uses less digits than its factorization.

19986064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178462 (or 178456 counting only the distinct ones).

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

The square root of 19986064 is about 4470.5775913186. The cubic root of 19986064 is about 271.3787001370.

The spelling of 19986064 in words is "nineteen million, nine hundred eighty-six thousand, sixty-four".