19804004 has 24 divisors (see below), whose sum is σ = 39799200. Its totient is φ = 8527680.

The previous prime is 19804003. The next prime is 19804007. The reversal of 19804004 is 40040891.

It is not an unprimeable number, because it can be changed into a prime (19804003) 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 7 ways as a sum of consecutive naturals, for example, 11009 + ... + 12680.

It is an arithmetic number, because the mean of its divisors is an integer number (1658300).

Almost surely, 2^19804004 is an apocalyptic number.

It is an amenable number.

19804004 is an abundant number, since it is smaller than the sum of its proper divisors (19995196).

19804004 is a wasteful number, since it uses less digits than its factorization.

19804004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23723 (or 23721 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 19804004 is about 4450.1689855555. The cubic root of 19804004 is about 270.5521576608.

Adding to 19804004 its reverse (40040891), we get a palindrome (59844895).

The spelling of 19804004 in words is "nineteen million, eight hundred four thousand, four".