20315314321 has 8 divisors (see below), whose sum is σ = 20596079304. Its totient is φ = 20034616320.

The previous prime is 20315314307. The next prime is 20315314373. The reversal of 20315314321 is 12341351302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1539463696 + 18775850625 = 39236^2 + 137025^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20315314321 - 2⁷ = 20315314193 is a prime.

It is a super-2 number, since 2×20315314321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315314391) 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, 1141725 + ... + 1159381.

It is an arithmetic number, because the mean of its divisors is an integer number (2574509913).

Almost surely, 2^20315314321 is an apocalyptic number.

It is an amenable number.

20315314321 is a deficient number, since it is larger than the sum of its proper divisors (280764983).

20315314321 is a wasteful number, since it uses less digits than its factorization.

20315314321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33491.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 20315314321 its reverse (12341351302), we get a palindrome (32656665623).

The spelling of 20315314321 in words is "twenty billion, three hundred fifteen million, three hundred fourteen thousand, three hundred twenty-one".