20424301111 has 4 divisors (see below), whose sum is σ = 20670377112. Its totient is φ = 20178225112.

The previous prime is 20424301099. The next prime is 20424301129. The reversal of 20424301111 is 11110342402.

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 20424301111 - 2¹⁵ = 20424268343 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 (20424301151) 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, 123037876 + ... + 123038041.

It is an arithmetic number, because the mean of its divisors is an integer number (5167594278).

Almost surely, 2^20424301111 is an apocalyptic number.

20424301111 is a deficient number, since it is larger than the sum of its proper divisors (246076001).

20424301111 is an equidigital number, since it uses as much as digits as its factorization.

20424301111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246076000.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20424301111 its reverse (11110342402), we get a palindrome (31534643513).

The spelling of 20424301111 in words is "twenty billion, four hundred twenty-four million, three hundred one thousand, one hundred eleven".