26223432421 has 2 divisors, whose sum is σ = 26223432422. Its totient is φ = 26223432420.

The previous prime is 26223432409. The next prime is 26223432461. The reversal of 26223432421 is 12423432262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23874576196 + 2348856225 = 154514^2 + 48465^2 .

It is a cyclic number.

It is not a de Polignac number, because 26223432421 - 2¹⁹ = 26222908133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26223432461) 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, 13111716210 + 13111716211.

It is an arithmetic number, because the mean of its divisors is an integer number (13111716211).

Almost surely, 2^26223432421 is an apocalyptic number.

It is an amenable number.

26223432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26223432421 is an equidigital number, since it uses as much as digits as its factorization.

26223432421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 31.

Adding to 26223432421 its reverse (12423432262), we get a palindrome (38646864683).

The spelling of 26223432421 in words is "twenty-six billion, two hundred twenty-three million, four hundred thirty-two thousand, four hundred twenty-one".