19966045 has 8 divisors (see below), whose sum is σ = 26137440. Its totient is φ = 14520720.

The previous prime is 19966031. The next prime is 19966049. The reversal of 19966045 is 54066991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19966045 - 2⁷ = 19965917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19965989 and 19966007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19966049) 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, 181455 + ... + 181564.

It is an arithmetic number, because the mean of its divisors is an integer number (3267180).

Almost surely, 2^19966045 is an apocalyptic number.

It is an amenable number.

19966045 is a deficient number, since it is larger than the sum of its proper divisors (6171395).

19966045 is a wasteful number, since it uses less digits than its factorization.

19966045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363035.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 19966045 is about 4468.3380579361. The cubic root of 19966045 is about 271.2880612281.

The spelling of 19966045 in words is "nineteen million, nine hundred sixty-six thousand, forty-five".