19966126 has 16 divisors (see below), whose sum is σ = 31929120. Its totient is φ = 9331200.

The previous prime is 19966091. The next prime is 19966129. The reversal of 19966126 is 62166991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19966129) 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 7 ways as a sum of consecutive naturals, for example, 3190 + ... + 7078.

It is an arithmetic number, because the mean of its divisors is an integer number (1995570).

Almost surely, 2^19966126 is an apocalyptic number.

19966126 is a deficient number, since it is larger than the sum of its proper divisors (11962994).

19966126 is a wasteful number, since it uses less digits than its factorization.

19966126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4059.

The product of its digits is 34992, while the sum is 40.

The square root of 19966126 is about 4468.3471216995. The cubic root of 19966126 is about 271.2884280893.

The spelling of 19966126 in words is "nineteen million, nine hundred sixty-six thousand, one hundred twenty-six".