20243311 has 16 divisors (see below), whose sum is σ = 23632128. Its totient is φ = 17136000.

The previous prime is 20243309. The next prime is 20243339. The reversal of 20243311 is 11334202.

It is a happy number.

It is not a de Polignac number, because 20243311 - 2¹ = 20243309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18736 + ... + 19786.

It is an arithmetic number, because the mean of its divisors is an integer number (1477008).

Almost surely, 2^20243311 is an apocalyptic number.

20243311 is a deficient number, since it is larger than the sum of its proper divisors (3388817).

20243311 is a wasteful number, since it uses less digits than its factorization.

20243311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20243311 is about 4499.2567163922. The cubic root of 20243311 is about 272.5380739663.

Adding to 20243311 its reverse (11334202), we get a palindrome (31577513).

It can be divided in two parts, 2024 and 3311, that added together give a palindrome (5335).

The spelling of 20243311 in words is "twenty million, two hundred forty-three thousand, three hundred eleven".