20203112321 has 8 divisors (see below), whose sum is σ = 23381541120. Its totient is φ = 17097751008.

The previous prime is 20203112311. The next prime is 20203112329. The reversal of 20203112321 is 12321130202.

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 20203112321 - 2³⁰ = 19129370497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20203112321.

It is not an unprimeable number, because it can be changed into a prime (20203112329) 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, 18266276 + ... + 18267381.

It is an arithmetic number, because the mean of its divisors is an integer number (2922692640).

Almost surely, 2^20203112321 is an apocalyptic number.

It is an amenable number.

20203112321 is a deficient number, since it is larger than the sum of its proper divisors (3178428799).

20203112321 is an equidigital number, since it uses as much as digits as its factorization.

20203112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36533743.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20203112321 its reverse (12321130202), we get a palindrome (32524242523).

The spelling of 20203112321 in words is "twenty billion, two hundred three million, one hundred twelve thousand, three hundred twenty-one".