21244334313 has 8 divisors (see below), whose sum is σ = 28327340800. Its totient is φ = 14162108688.

The previous prime is 21244334299. The next prime is 21244334347. The reversal of 21244334313 is 31343344212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21244334313 - 2⁶ = 21244334249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21244334413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128473 + ... + 242886.

It is an arithmetic number, because the mean of its divisors is an integer number (3540917600).

Almost surely, 2^21244334313 is an apocalyptic number.

It is an amenable number.

21244334313 is a deficient number, since it is larger than the sum of its proper divisors (7083006487).

21244334313 is a wasteful number, since it uses less digits than its factorization.

21244334313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390431.

The product of its digits is 20736, while the sum is 30.

Adding to 21244334313 its reverse (31343344212), we get a palindrome (52587678525).

The spelling of 21244334313 in words is "twenty-one billion, two hundred forty-four million, three hundred thirty-four thousand, three hundred thirteen".