17845219396 has 27 divisors (see below), whose sum is σ = 33182646679. Its totient is φ = 8395612928.

The previous prime is 17845219391. The next prime is 17845219421. The reversal of 17845219396 is 69391254871.

It is a happy number.

The square root of 17845219396 is 133586.

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

It can be written as a sum of positive squares in 4 ways, for example, as 192376900 + 17652842496 = 13870^2 + 132864^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17845219391) 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 8 ways as a sum of consecutive naturals, for example, 4539960 + ... + 4543888.

Almost surely, 2^17845219396 is an apocalyptic number.

17845219396 is the 133586-th square number.

It is an amenable number.

17845219396 is a deficient number, since it is larger than the sum of its proper divisors (15337427283).

17845219396 is an frugal number, since it uses more digits than its factorization.

17845219396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7896 (or 3948 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The spelling of 17845219396 in words is "seventeen billion, eight hundred forty-five million, two hundred nineteen thousand, three hundred ninety-six".