19403932804 has 45 divisors (see below), whose sum is σ = 36229489401. Its totient is φ = 9093373440.

The previous prime is 19403932789. The next prime is 19403932817. The reversal of 19403932804 is 40823930491.

The square root of 19403932804 is 139298.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 94051204 + 19309881600 = 9698^2 + 138960^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 80514124 + ... + 80514364.

Almost surely, 2^19403932804 is an apocalyptic number.

19403932804 is the 139298-th square number.

It is an amenable number.

19403932804 is a deficient number, since it is larger than the sum of its proper divisors (16825556597).

19403932804 is an frugal number, since it uses more digits than its factorization.

19403932804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 19403932804 in words is "nineteen billion, four hundred three million, nine hundred thirty-two thousand, eight hundred four".