20031303211 has 4 divisors (see below), whose sum is σ = 20519871624. Its totient is φ = 19542734800.

The previous prime is 20031303181. The next prime is 20031303217. The reversal of 20031303211 is 11230313002.

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

It is a cyclic number.

It is not a de Polignac number, because 20031303211 - 2³¹ = 17883819563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031303217) 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, 244284145 + ... + 244284226.

It is an arithmetic number, because the mean of its divisors is an integer number (5129967906).

Almost surely, 2^20031303211 is an apocalyptic number.

20031303211 is a deficient number, since it is larger than the sum of its proper divisors (488568413).

20031303211 is an equidigital number, since it uses as much as digits as its factorization.

20031303211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488568412.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20031303211 its reverse (11230313002), we get a palindrome (31261616213).

The spelling of 20031303211 in words is "twenty billion, thirty-one million, three hundred three thousand, two hundred eleven".