21434332313 has 8 divisors (see below), whose sum is σ = 21999287016. Its totient is φ = 20871385600.

The previous prime is 21434332289. The next prime is 21434332333. The reversal of 21434332313 is 31323343412.

It can be written as a sum of positive squares in 4 ways, for example, as 314104729 + 21120227584 = 17723^2 + 145328^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21434332313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21434332333) 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, 480356 + ... + 523077.

It is an arithmetic number, because the mean of its divisors is an integer number (2749910877).

Almost surely, 2^21434332313 is an apocalyptic number.

It is an amenable number.

21434332313 is a deficient number, since it is larger than the sum of its proper divisors (564954703).

21434332313 is a wasteful number, since it uses less digits than its factorization.

21434332313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003995.

The product of its digits is 15552, while the sum is 29.

Adding to 21434332313 its reverse (31323343412), we get a palindrome (52757675725).

The spelling of 21434332313 in words is "twenty-one billion, four hundred thirty-four million, three hundred thirty-two thousand, three hundred thirteen".