19979066 has 8 divisors (see below), whose sum is σ = 30935424. Its totient is φ = 9667260.

The previous prime is 19979059. The next prime is 19979081. The reversal of 19979066 is 66097991.

It is a happy number.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19979066.

It is an unprimeable number.

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, 161060 + ... + 161183.

It is an arithmetic number, because the mean of its divisors is an integer number (3866928).

Almost surely, 2^19979066 is an apocalyptic number.

19979066 is a deficient number, since it is larger than the sum of its proper divisors (10956358).

19979066 is a wasteful number, since it uses less digits than its factorization.

19979066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322276.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 19979066 is about 4469.7948498785. The cubic root of 19979066 is about 271.3470225667.

The spelling of 19979066 in words is "nineteen million, nine hundred seventy-nine thousand, sixty-six".