19899674 has 8 divisors (see below), whose sum is σ = 29883168. Its totient is φ = 9938620.

The previous prime is 19899653. The next prime is 19899679. The reversal of 19899674 is 47699891.

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 not an unprimeable number, because it can be changed into a prime (19899679) by changing a digit.

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, 3182 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (3735396).

Almost surely, 2^19899674 is an apocalyptic number.

19899674 is a deficient number, since it is larger than the sum of its proper divisors (9983494).

19899674 is a wasteful number, since it uses less digits than its factorization.

19899674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11220.

The product of its digits is 979776, while the sum is 53.

The square root of 19899674 is about 4460.9050651185. The cubic root of 19899674 is about 270.9871228387.

The spelling of 19899674 in words is "nineteen million, eight hundred ninety-nine thousand, six hundred seventy-four".