19415849820964 has 27 divisors (see below), whose sum is σ = 34031785228497. Its totient is φ = 9692507119824.

The previous prime is 19415849820947. The next prime is 19415849820979. The reversal of 19415849820964 is 46902894851491.

The square root of 19415849820964 is 4406342.

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

It can be written as a sum of positive squares in only one way, i.e., 360948624100 + 19054901196864 = 600790^2 + 4365192^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19415849820893 and 19415849820902.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7252837594 + ... + 7252840270.

Almost surely, 2^{19415849820964} is an apocalyptic number.

19415849820964 is the 4406342-nd square number.

It is an amenable number.

19415849820964 is a deficient number, since it is larger than the sum of its proper divisors (14615935407533).

19415849820964 is an frugal number, since it uses more digits than its factorization.

19415849820964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004 (or 3502 counting only the distinct ones).

The product of its (nonzero) digits is 179159040, while the sum is 70.

The spelling of 19415849820964 in words is "nineteen trillion, four hundred fifteen billion, eight hundred forty-nine million, eight hundred twenty thousand, nine hundred sixty-four".