20424131430251 has 8 divisors (see below), whose sum is σ = 20689433616240. Its totient is φ = 20160207438048.

The previous prime is 20424131430161. The next prime is 20424131430277. The reversal of 20424131430251 is 15203413142402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20424131430251 - 2¹⁰ = 20424131429227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424131430281) 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 7 ways as a sum of consecutive naturals, for example, 344518616 + ... + 344577893.

It is an arithmetic number, because the mean of its divisors is an integer number (2586179202030).

Almost surely, 2^{20424131430251} is an apocalyptic number.

20424131430251 is a deficient number, since it is larger than the sum of its proper divisors (265302185989).

20424131430251 is a wasteful number, since it uses less digits than its factorization.

20424131430251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689096893.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 20424131430251 its reverse (15203413142402), we get a palindrome (35627544572653).

The spelling of 20424131430251 in words is "twenty trillion, four hundred twenty-four billion, one hundred thirty-one million, four hundred thirty thousand, two hundred fifty-one".