20424111 has 12 divisors (see below), whose sum is σ = 27993672. Its totient is φ = 13245408.

The previous prime is 20424101. The next prime is 20424113. The reversal of 20424111 is 11142402.

It is not a de Polignac number, because 20424111 - 2¹⁰ = 20423087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1621 + ... + 6593.

It is an arithmetic number, because the mean of its divisors is an integer number (2332806).

Almost surely, 2^20424111 is an apocalyptic number.

20424111 is a deficient number, since it is larger than the sum of its proper divisors (7569561).

20424111 is an equidigital number, since it uses as much as digits as its factorization.

20424111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050 (or 5013 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 20424111 is about 4519.3042606136. The cubic root of 20424111 is about 273.3470475305.

Adding to 20424111 its reverse (11142402), we get a palindrome (31566513).

The spelling of 20424111 in words is "twenty million, four hundred twenty-four thousand, one hundred eleven".