19916086 has 8 divisors (see below), whose sum is σ = 30053520. Its totient is φ = 9898248.

The previous prime is 19916053. The next prime is 19916087. The reversal of 19916086 is 68061991.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19916087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29481 + ... + 30148.

It is an arithmetic number, because the mean of its divisors is an integer number (3756690).

Almost surely, 2^19916086 is an apocalyptic number.

19916086 is a deficient number, since it is larger than the sum of its proper divisors (10137434).

19916086 is a wasteful number, since it uses less digits than its factorization.

19916086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59798.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 19916086 is about 4462.7442230090. The cubic root of 19916086 is about 271.0616000816.

The spelling of 19916086 in words is "nineteen million, nine hundred sixteen thousand, eighty-six".