20023301321 has 4 divisors (see below), whose sum is σ = 20023654272. Its totient is φ = 20022948372.

The previous prime is 20023301293. The next prime is 20023301381. The reversal of 20023301321 is 12310332002.

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 a de Polignac number, because none of the positive numbers 2^k-20023301321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20023301321.

It is not an unprimeable number, because it can be changed into a prime (20023301381) 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, 69941 + ... + 211986.

It is an arithmetic number, because the mean of its divisors is an integer number (5005913568).

Almost surely, 2^20023301321 is an apocalyptic number.

It is an amenable number.

20023301321 is a deficient number, since it is larger than the sum of its proper divisors (352951).

20023301321 is an equidigital number, since it uses as much as digits as its factorization.

20023301321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352950.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20023301321 its reverse (12310332002), we get a palindrome (32333633323).

The spelling of 20023301321 in words is "twenty billion, twenty-three million, three hundred one thousand, three hundred twenty-one".