21198160389316 has 27 divisors (see below), whose sum is σ = 37150115670759. Its totient is φ = 10583863492128.

The previous prime is 21198160389281. The next prime is 21198160389317. The reversal of 21198160389316 is 61398306189112.

The square root of 21198160389316 is 4604146.

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 10254661244100 + 10943499145216 = 3202290^2 + 3308096^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21198160389317) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9180665970 + ... + 9180668278.

Almost surely, 2^{21198160389316} is an apocalyptic number.

21198160389316 is the 4604146-th square number.

It is an amenable number.

21198160389316 is a deficient number, since it is larger than the sum of its proper divisors (15951955281443).

21198160389316 is an frugal number, since it uses more digits than its factorization.

21198160389316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616 (or 3308 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 58.

The spelling of 21198160389316 in words is "twenty-one trillion, one hundred ninety-eight billion, one hundred sixty million, three hundred eighty-nine thousand, three hundred sixteen".