20000421431 has 2 divisors, whose sum is σ = 20000421432. Its totient is φ = 20000421430.

The previous prime is 20000421401. The next prime is 20000421449. The reversal of 20000421431 is 13412400002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000421431 is a prime.

It is a super-2 number, since 2×20000421431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000421401) 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 as a sum of consecutive naturals, namely, 10000210715 + 10000210716.

It is an arithmetic number, because the mean of its divisors is an integer number (10000210716).

Almost surely, 2^20000421431 is an apocalyptic number.

20000421431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000421431 is an equidigital number, since it uses as much as digits as its factorization.

20000421431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20000421431 its reverse (13412400002), we get a palindrome (33412821433).

The spelling of 20000421431 in words is "twenty billion, four hundred twenty-one thousand, four hundred thirty-one".