21344004213 has 32 divisors (see below), whose sum is σ = 33466752000. Its totient is φ = 11846290176.

The previous prime is 21344004211. The next prime is 21344004247. The reversal of 21344004213 is 31240044312.

It is not a de Polignac number, because 21344004213 - 2¹ = 21344004211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344004211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95613 + ... + 227661.

It is an arithmetic number, because the mean of its divisors is an integer number (1045836000).

Almost surely, 2^21344004213 is an apocalyptic number.

It is an amenable number.

21344004213 is a deficient number, since it is larger than the sum of its proper divisors (12122747787).

21344004213 is a wasteful number, since it uses less digits than its factorization.

21344004213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132281.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21344004213 its reverse (31240044312), we get a palindrome (52584048525).

The spelling of 21344004213 in words is "twenty-one billion, three hundred forty-four million, four thousand, two hundred thirteen".