20203321331 has 4 divisors (see below), whose sum is σ = 20236066392. Its totient is φ = 20170576272.

The previous prime is 20203321301. The next prime is 20203321361. The reversal of 20203321331 is 13312330202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20203321301) and next prime (20203321361).

It is a cyclic number.

It is not a de Polignac number, because 20203321331 - 2¹⁰ = 20203320307 is a prime.

It is a super-2 number, since 2×20203321331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203321301) 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, 16371605 + ... + 16372838.

It is an arithmetic number, because the mean of its divisors is an integer number (5059016598).

Almost surely, 2^20203321331 is an apocalyptic number.

20203321331 is a deficient number, since it is larger than the sum of its proper divisors (32745061).

20203321331 is an equidigital number, since it uses as much as digits as its factorization.

20203321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32745060.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20203321331 its reverse (13312330202), we get a palindrome (33515651533).

The spelling of 20203321331 in words is "twenty billion, two hundred three million, three hundred twenty-one thousand, three hundred thirty-one".