20424004100 has 18 divisors (see below), whose sum is σ = 44320089114. Its totient is φ = 8169601600.

The previous prime is 20424004067. The next prime is 20424004127. The reversal of 20424004100 is 140042402.

It can be written as a sum of positive squares in 3 ways, for example, as 50438404 + 20373565696 = 7102^2 + 142736^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102119921 + ... + 102120120.

It is an arithmetic number, because the mean of its divisors is an integer number (2462227173).

Almost surely, 2^20424004100 is an apocalyptic number.

20424004100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424004100 is an abundant number, since it is smaller than the sum of its proper divisors (23896085014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20424004100 is a wasteful number, since it uses less digits than its factorization.

20424004100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204240055 (or 204240048 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20424004100 its reverse (140042402), we get a palindrome (20564046502).

The spelling of 20424004100 in words is "twenty billion, four hundred twenty-four million, four thousand, one hundred".