20424105 has 24 divisors (see below), whose sum is σ = 38126088. Its totient is φ = 10054656.

The previous prime is 20424101. The next prime is 20424113. The reversal of 20424105 is 50142402.

It can be written as a sum of positive squares in 4 ways, for example, as 281961 + 20142144 = 531^2 + 4488^2 .

It is not a de Polignac number, because 20424105 - 2² = 20424101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20424101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16872 + ... + 18041.

It is an arithmetic number, because the mean of its divisors is an integer number (1588587).

Almost surely, 2^20424105 is an apocalyptic number.

It is an amenable number.

20424105 is a deficient number, since it is larger than the sum of its proper divisors (17701983).

20424105 is a wasteful number, since it uses less digits than its factorization.

20424105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34937 (or 34934 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20424105 is about 4519.3035967945. The cubic root of 20424105 is about 273.3470207635.

Adding to 20424105 its reverse (50142402), we get a palindrome (70566507).

The spelling of 20424105 in words is "twenty million, four hundred twenty-four thousand, one hundred five".