20424110421 has 24 divisors (see below), whose sum is σ = 32235390880. Its totient is φ = 11426073120.

The previous prime is 20424110407. The next prime is 20424110461. The reversal of 20424110421 is 12401142402.

It is not a de Polignac number, because 20424110421 - 2⁵ = 20424110389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424110461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2159311 + ... + 2168748.

Almost surely, 2^20424110421 is an apocalyptic number.

It is an amenable number.

20424110421 is a deficient number, since it is larger than the sum of its proper divisors (11811280459).

20424110421 is a wasteful number, since it uses less digits than its factorization.

20424110421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328097 (or 4328086 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20424110421 its reverse (12401142402), we get a palindrome (32825252823).

The spelling of 20424110421 in words is "twenty billion, four hundred twenty-four million, one hundred ten thousand, four hundred twenty-one".