21322332313 has 4 divisors (see below), whose sum is σ = 21325714020. Its totient is φ = 21318950608.

The previous prime is 21322332293. The next prime is 21322332319. The reversal of 21322332313 is 31323322312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12221744704 + 9100587609 = 110552^2 + 95397^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322332313 - 2³³ = 12732397721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21322332319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1681378 + ... + 1694011.

It is an arithmetic number, because the mean of its divisors is an integer number (5331428505).

Almost surely, 2^21322332313 is an apocalyptic number.

It is an amenable number.

21322332313 is a deficient number, since it is larger than the sum of its proper divisors (3381707).

21322332313 is an equidigital number, since it uses as much as digits as its factorization.

21322332313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381706.

The product of its digits is 3888, while the sum is 25.

Adding to 21322332313 its reverse (31323322312), we get a palindrome (52645654625).

The spelling of 21322332313 in words is "twenty-one billion, three hundred twenty-two million, three hundred thirty-two thousand, three hundred thirteen".