20023113211 has 4 divisors (see below), whose sum is σ = 20023807752. Its totient is φ = 20022418672.

The previous prime is 20023113157. The next prime is 20023113223. The reversal of 20023113211 is 11231132002.

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 20023113211 - 2⁹ = 20023112699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023113811) 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, 302065 + ... + 362338.

It is an arithmetic number, because the mean of its divisors is an integer number (5005951938).

Almost surely, 2^20023113211 is an apocalyptic number.

20023113211 is a deficient number, since it is larger than the sum of its proper divisors (694541).

20023113211 is an equidigital number, since it uses as much as digits as its factorization.

20023113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694540.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20023113211 its reverse (11231132002), we get a palindrome (31254245213).

The spelling of 20023113211 in words is "twenty billion, twenty-three million, one hundred thirteen thousand, two hundred eleven".