19916674 has 8 divisors (see below), whose sum is σ = 31447440. Its totient is φ = 9434196.

The previous prime is 19916671. The next prime is 19916713. The reversal of 19916674 is 47661991.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19916674.

It is not an unprimeable number, because it can be changed into a prime (19916671) 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, 262024 + ... + 262099.

It is an arithmetic number, because the mean of its divisors is an integer number (3930930).

Almost surely, 2^19916674 is an apocalyptic number.

19916674 is a deficient number, since it is larger than the sum of its proper divisors (11530766).

19916674 is a wasteful number, since it uses less digits than its factorization.

19916674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524144.

The product of its digits is 81648, while the sum is 43.

The square root of 19916674 is about 4462.8101012703. The cubic root of 19916674 is about 271.0642676515.

The spelling of 19916674 in words is "nineteen million, nine hundred sixteen thousand, six hundred seventy-four".