19804359004 has 24 divisors (see below), whose sum is σ = 34788112128. Its totient is φ = 9864968640.

The previous prime is 19804358971. The next prime is 19804359013. The reversal of 19804359004 is 40095340891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195909 + ... + 1212355.

It is an arithmetic number, because the mean of its divisors is an integer number (1449504672).

Almost surely, 2^19804359004 is an apocalyptic number.

It is an amenable number.

19804359004 is a deficient number, since it is larger than the sum of its proper divisors (14983753124).

19804359004 is a wasteful number, since it uses less digits than its factorization.

19804359004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17565 (or 17563 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

Adding to 19804359004 its reverse (40095340891), we get a palindrome (59899699895).

The spelling of 19804359004 in words is "nineteen billion, eight hundred four million, three hundred fifty-nine thousand, four".