19917104 has 10 divisors (see below), whose sum is σ = 38589420. Its totient is φ = 9958544.

The previous prime is 19917067. The next prime is 19917167. The reversal of 19917104 is 40171991.

It is a happy number.

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 as a sum of consecutive naturals, namely, 622394 + ... + 622425.

It is an arithmetic number, because the mean of its divisors is an integer number (3858942).

Almost surely, 2^19917104 is an apocalyptic number.

It is an amenable number.

19917104 is a deficient number, since it is larger than the sum of its proper divisors (18672316).

19917104 is a wasteful number, since it uses less digits than its factorization.

19917104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244827 (or 1244821 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 19917104 is about 4462.8582769342. The cubic root of 19917104 is about 271.0662183921.

The spelling of 19917104 in words is "nineteen million, nine hundred seventeen thousand, one hundred four".