20343123321 has 32 divisors (see below), whose sum is σ = 29105568000. Its totient is φ = 12593971200.

The previous prime is 20343123257. The next prime is 20343123347. The reversal of 20343123321 is 12332134302.

It is not a de Polignac number, because 20343123321 - 2⁶ = 20343123257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20343123291 and 20343123300.

It is not an unprimeable number, because it can be changed into a prime (20343123121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1138585 + ... + 1156313.

It is an arithmetic number, because the mean of its divisors is an integer number (909549000).

Almost surely, 2^20343123321 is an apocalyptic number.

It is an amenable number.

20343123321 is a deficient number, since it is larger than the sum of its proper divisors (8762444679).

20343123321 is a wasteful number, since it uses less digits than its factorization.

20343123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18049.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 20343123321 its reverse (12332134302), we get a palindrome (32675257623).

The spelling of 20343123321 in words is "twenty billion, three hundred forty-three million, one hundred twenty-three thousand, three hundred twenty-one".