21325852313 has 4 divisors (see below), whose sum is σ = 21433017600. Its totient is φ = 21218687028.

The previous prime is 21325852309. The next prime is 21325852337. The reversal of 21325852313 is 31325852312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21325852313 - 2² = 21325852309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21325852363) 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, 53582345 + ... + 53582742.

It is an arithmetic number, because the mean of its divisors is an integer number (5358254400).

Almost surely, 2^21325852313 is an apocalyptic number.

It is an amenable number.

21325852313 is a deficient number, since it is larger than the sum of its proper divisors (107165287).

21325852313 is a wasteful number, since it uses less digits than its factorization.

21325852313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107165286.

The product of its digits is 43200, while the sum is 35.

Subtracting 21325852313 from its reverse (31325852312), we obtain a palindrome (9999999999).

The spelling of 21325852313 in words is "twenty-one billion, three hundred twenty-five million, eight hundred fifty-two thousand, three hundred thirteen".