19445744704 has 21 divisors (see below), whose sum is σ = 38589863511. Its totient is φ = 9722314560.

The previous prime is 19445744701. The next prime is 19445744707. The reversal of 19445744704 is 40744754491.

The square root of 19445744704 is 139448.

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

It is an interprime number because it is at equal distance from previous prime (19445744701) and next prime (19445744707).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19445744701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1106869 + ... + 1124299.

Almost surely, 2^19445744704 is an apocalyptic number.

19445744704 is the 139448-th square number.

It is an amenable number.

19445744704 is a deficient number, since it is larger than the sum of its proper divisors (19144118807).

19445744704 is an frugal number, since it uses more digits than its factorization.

19445744704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34874 (or 17433 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 49.

Multiplying 19445744704 by its sum of digits (49), we get a square (952841490496 = 976136²).

The spelling of 19445744704 in words is "nineteen billion, four hundred forty-five million, seven hundred forty-four thousand, seven hundred four".