19827174481 has 9 divisors (see below), whose sum is σ = 20928456873. Its totient is φ = 18781104420.

The previous prime is 19827174469. The next prime is 19827174503. The reversal of 19827174481 is 18447172891.

The square root of 19827174481 is 140809.

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

It is not a de Polignac number, because 19827174481 - 2¹¹ = 19827172433 is a prime.

It is a super-2 number, since 2×19827174481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19827172481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2671666 + ... + 2679076.

It is an arithmetic number, because the mean of its divisors is an integer number (2325384097).

Almost surely, 2^19827174481 is an apocalyptic number.

19827174481 is the 140809-th square number.

19827174481 is the 70405-th centered octagonal number.

It is an amenable number.

19827174481 is a deficient number, since it is larger than the sum of its proper divisors (1101282392).

19827174481 is an frugal number, since it uses more digits than its factorization.

19827174481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14860 (or 7430 counting only the distinct ones).

The product of its digits is 903168, while the sum is 52.

The spelling of 19827174481 in words is "nineteen billion, eight hundred twenty-seven million, one hundred seventy-four thousand, four hundred eighty-one".