19904674 has 4 divisors (see below), whose sum is σ = 29857014. Its totient is φ = 9952336.

The previous prime is 19904663. The next prime is 19904681. The reversal of 19904674 is 47640991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19421649 + 483025 = 4407^2 + 695^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 4976167 + ... + 4976170.

Almost surely, 2^19904674 is an apocalyptic number.

19904674 is a deficient number, since it is larger than the sum of its proper divisors (9952340).

19904674 is an equidigital number, since it uses as much as digits as its factorization.

19904674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9952339.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 19904674 is about 4461.4654543098. The cubic root of 19904674 is about 271.0098170488.

The spelling of 19904674 in words is "nineteen million, nine hundred four thousand, six hundred seventy-four".