20424120040231 has 4 divisors (see below), whose sum is σ = 20529944496592. Its totient is φ = 20318295583872.

The previous prime is 20424120040169. The next prime is 20424120040237. The reversal of 20424120040231 is 13204002142402.

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 20424120040231 - 2¹³ = 20424120032039 is a prime.

It is a super-2 number, since 2×20424120040231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20424120040196 and 20424120040205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424120040237) 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, 52912227891 + ... + 52912228276.

It is an arithmetic number, because the mean of its divisors is an integer number (5132486124148).

Almost surely, 2^{20424120040231} is an apocalyptic number.

20424120040231 is a deficient number, since it is larger than the sum of its proper divisors (105824456361).

20424120040231 is a wasteful number, since it uses less digits than its factorization.

20424120040231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105824456360.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20424120040231 its reverse (13204002142402), we get a palindrome (33628122182633).

The spelling of 20424120040231 in words is "twenty trillion, four hundred twenty-four billion, one hundred twenty million, forty thousand, two hundred thirty-one".