20243102311 has 4 divisors (see below), whose sum is σ = 20586205800. Its totient is φ = 19899998824.

The previous prime is 20243102273. The next prime is 20243102333. The reversal of 20243102311 is 11320134202.

It is a happy number.

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 20243102311 - 2⁷ = 20243102183 is a prime.

It is a super-2 number, since 2×20243102311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243102371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171551656 + ... + 171551773.

It is an arithmetic number, because the mean of its divisors is an integer number (5146551450).

Almost surely, 2^20243102311 is an apocalyptic number.

20243102311 is a deficient number, since it is larger than the sum of its proper divisors (343103489).

20243102311 is an equidigital number, since it uses as much as digits as its factorization.

20243102311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343103488.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20243102311 its reverse (11320134202), we get a palindrome (31563236513).

The spelling of 20243102311 in words is "twenty billion, two hundred forty-three million, one hundred two thousand, three hundred eleven".