19986073 has 4 divisors (see below), whose sum is σ = 20324880. Its totient is φ = 19647268.

The previous prime is 19986061. The next prime is 19986077. The reversal of 19986073 is 37068991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37068991 = 449 ⋅82559.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19986073 is a prime.

It is a super-2 number, since 2×19986073² = 798886227922658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19986077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169315 + ... + 169432.

It is an arithmetic number, because the mean of its divisors is an integer number (5081220).

Almost surely, 2^19986073 is an apocalyptic number.

It is an amenable number.

19986073 is a deficient number, since it is larger than the sum of its proper divisors (338807).

19986073 is an equidigital number, since it uses as much as digits as its factorization.

19986073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338806.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 19986073 is about 4470.5785978998. The cubic root of 19986073 is about 271.3787408721.

The spelling of 19986073 in words is "nineteen million, nine hundred eighty-six thousand, seventy-three".