21344131274 has 32 divisors (see below), whose sum is σ = 32790952656. Its totient is φ = 10416107520.

The previous prime is 21344131273. The next prime is 21344131279. The reversal of 21344131274 is 47213144312.

It can be written as a sum of positive squares in 8 ways, for example, as 18803265625 + 2540865649 = 137125^2 + 50407^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21344131274.

It is not an unprimeable number, because it can be changed into a prime (21344131273) 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 15 ways as a sum of consecutive naturals, for example, 28195304 + ... + 28196060.

Almost surely, 2^21344131274 is an apocalyptic number.

21344131274 is a deficient number, since it is larger than the sum of its proper divisors (11446821382).

21344131274 is a wasteful number, since it uses less digits than its factorization.

21344131274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850.

The product of its digits is 16128, while the sum is 32.

Adding to 21344131274 its reverse (47213144312), we get a palindrome (68557275586).

The spelling of 21344131274 in words is "twenty-one billion, three hundred forty-four million, one hundred thirty-one thousand, two hundred seventy-four".