20004430307431 has 4 divisors (see below), whose sum is σ = 20004479576200. Its totient is φ = 20004381038664.

The previous prime is 20004430307429. The next prime is 20004430307567. The reversal of 20004430307431 is 13470303440002.

It is a happy number.

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 20004430307431 - 2¹ = 20004430307429 is a prime.

It is a super-2 number, since 2×20004430307431² (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 = 20004430307393 and 20004430307402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004430304431) 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, 24020241 + ... + 24839098.

It is an arithmetic number, because the mean of its divisors is an integer number (5001119894050).

Almost surely, 2^{20004430307431} is an apocalyptic number.

20004430307431 is a deficient number, since it is larger than the sum of its proper divisors (49268769).

20004430307431 is an equidigital number, since it uses as much as digits as its factorization.

20004430307431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49268768.

The product of its (nonzero) digits is 24192, while the sum is 31.

Adding to 20004430307431 its reverse (13470303440002), we get a palindrome (33474733747433).

The spelling of 20004430307431 in words is "twenty trillion, four billion, four hundred thirty million, three hundred seven thousand, four hundred thirty-one".