19996066 has 4 divisors (see below), whose sum is σ = 29994102. Its totient is φ = 9998032.

The previous prime is 19996061. The next prime is 19996073. The reversal of 19996066 is 66069991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19053225 + 942841 = 4365^2 + 971^2 .

It is not an unprimeable number, because it can be changed into a prime (19996061) 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 as a sum of consecutive naturals, namely, 4999015 + ... + 4999018.

Almost surely, 2^19996066 is an apocalyptic number.

19996066 is a deficient number, since it is larger than the sum of its proper divisors (9998036).

19996066 is an equidigital number, since it uses as much as digits as its factorization.

19996066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9998035.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 19996066 is about 4471.6960987974. The cubic root of 19996066 is about 271.4239629609.

The spelling of 19996066 in words is "nineteen million, nine hundred ninety-six thousand, sixty-six".