20424032431431 has 4 divisors (see below), whose sum is σ = 27232043241912. Its totient is φ = 13616021620952.

The previous prime is 20424032431379. The next prime is 20424032431459. The reversal of 20424032431431 is 13413423042402.

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 20424032431431 - 2⁶ = 20424032431367 is a prime.

It is a super-2 number, since 2×20424032431431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20424032431392 and 20424032431401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424032439431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3404005405236 + ... + 3404005405241.

It is an arithmetic number, because the mean of its divisors is an integer number (6808010810478).

Almost surely, 2^{20424032431431} is an apocalyptic number.

20424032431431 is a deficient number, since it is larger than the sum of its proper divisors (6808010810481).

20424032431431 is an equidigital number, since it uses as much as digits as its factorization.

20424032431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808010810480.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 20424032431431 its reverse (13413423042402), we get a palindrome (33837455473833).

The spelling of 20424032431431 in words is "twenty trillion, four hundred twenty-four billion, thirty-two million, four hundred thirty-one thousand, four hundred thirty-one".