20313144321 has 16 divisors (see below), whose sum is σ = 28512768000. Its totient is φ = 12827963088.

The previous prime is 20313144317. The next prime is 20313144343. The reversal of 20313144321 is 12344131302.

It is a happy number.

It is not a de Polignac number, because 20313144321 - 2² = 20313144317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20313144291 and 20313144300.

It is not an unprimeable number, because it can be changed into a prime (20313144391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 854620 + ... + 878066.

It is an arithmetic number, because the mean of its divisors is an integer number (1782048000).

Almost surely, 2^20313144321 is an apocalyptic number.

It is an amenable number.

20313144321 is a deficient number, since it is larger than the sum of its proper divisors (8199623679).

20313144321 is a wasteful number, since it uses less digits than its factorization.

20313144321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38668.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20313144321 its reverse (12344131302), we get a palindrome (32657275623).

The spelling of 20313144321 in words is "twenty billion, three hundred thirteen million, one hundred forty-four thousand, three hundred twenty-one".