20424111233 has 4 divisors (see below), whose sum is σ = 20899090608. Its totient is φ = 19949131860.

The previous prime is 20424111221. The next prime is 20424111247. The reversal of 20424111233 is 33211142402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20424111233 - 2¹⁰ = 20424110209 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 20424111199 and 20424111208.

It is not an unprimeable number, because it can be changed into a prime (20424111263) 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, 237489623 + ... + 237489708.

It is an arithmetic number, because the mean of its divisors is an integer number (5224772652).

Almost surely, 2^20424111233 is an apocalyptic number.

It is an amenable number.

20424111233 is a deficient number, since it is larger than the sum of its proper divisors (474979375).

20424111233 is an equidigital number, since it uses as much as digits as its factorization.

20424111233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474979374.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20424111233 its reverse (33211142402), we get a palindrome (53635253635).

The spelling of 20424111233 in words is "twenty billion, four hundred twenty-four million, one hundred eleven thousand, two hundred thirty-three".