21344241513 has 16 divisors (see below), whose sum is σ = 32546304000. Its totient is φ = 12188554896.

The previous prime is 21344241511. The next prime is 21344241533. The reversal of 21344241513 is 31514244312.

It is not a de Polignac number, because 21344241513 - 2¹ = 21344241511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21344241511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307545 + ... + 370502.

It is an arithmetic number, because the mean of its divisors is an integer number (2034144000).

Almost surely, 2^21344241513 is an apocalyptic number.

It is an amenable number.

21344241513 is a deficient number, since it is larger than the sum of its proper divisors (11202062487).

21344241513 is a wasteful number, since it uses less digits than its factorization.

21344241513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679556.

The product of its digits is 11520, while the sum is 30.

Adding to 21344241513 its reverse (31514244312), we get a palindrome (52858485825).

The spelling of 21344241513 in words is "twenty-one billion, three hundred forty-four million, two hundred forty-one thousand, five hundred thirteen".