19399100522481 has 27 divisors (see below), whose sum is σ = 28287309824683. Its totient is φ = 12810933270240.

The previous prime is 19399100522449. The next prime is 19399100522513. The reversal of 19399100522481 is 18422500199391.

It is a happy number.

The square root of 19399100522481 is 4404441.

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

19399100522481 is a `hidden beast` number, since 1 + 9 + 3 + 9 + 9 + 100 + 52 + 2 + 481 = 666.

It is an interprime number because it is at equal distance from previous prime (19399100522449) and next prime (19399100522513).

It can be written as a sum of positive squares in only one way, i.e., 4062478082481 + 15336622440000 = 2015559^2 + 3916200^2 .

It is not a de Polignac number, because 19399100522481 - 2⁵ = 19399100522449 is a prime.

It is a super-2 number, since 2×19399100522481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19399100522441) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1413818701 + ... + 1413832421.

Almost surely, 2^{19399100522481} is an apocalyptic number.

19399100522481 is the 4404441-st square number.

19399100522481 is the 2202221-st centered octagonal number.

It is an amenable number.

19399100522481 is a deficient number, since it is larger than the sum of its proper divisors (8888209302202).

19399100522481 is an frugal number, since it uses more digits than its factorization.

19399100522481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27662 (or 13831 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 19399100522481 in words is "nineteen trillion, three hundred ninety-nine billion, one hundred million, five hundred twenty-two thousand, four hundred eighty-one".