20321420321 has 8 divisors (see below), whose sum is σ = 20365729440. Its totient is φ = 20277158112.

The previous prime is 20321420311. The next prime is 20321420323. The reversal of 20321420321 is 12302412302.

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 20321420321 - 2¹⁴ = 20321403937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321420293 and 20321420302.

It is not an unprimeable number, because it can be changed into a prime (20321420323) 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, 937421 + ... + 958853.

It is an arithmetic number, because the mean of its divisors is an integer number (2545716180).

Almost surely, 2^20321420321 is an apocalyptic number.

It is an amenable number.

20321420321 is a deficient number, since it is larger than the sum of its proper divisors (44309119).

20321420321 is a wasteful number, since it uses less digits than its factorization.

20321420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23455.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20321420321 its reverse (12302412302), we get a palindrome (32623832623).

The spelling of 20321420321 in words is "twenty billion, three hundred twenty-one million, four hundred twenty thousand, three hundred twenty-one".