23431324421 has 2 divisors, whose sum is σ = 23431324422. Its totient is φ = 23431324420.

The previous prime is 23431324409. The next prime is 23431324429. The reversal of 23431324421 is 12442313432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13061975521 + 10369348900 = 114289^2 + 101830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23431324421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23431324429) 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, 11715662210 + 11715662211.

It is an arithmetic number, because the mean of its divisors is an integer number (11715662211).

Almost surely, 2^23431324421 is an apocalyptic number.

It is an amenable number.

23431324421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23431324421 is an equidigital number, since it uses as much as digits as its factorization.

23431324421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

Adding to 23431324421 its reverse (12442313432), we get a palindrome (35873637853).

The spelling of 23431324421 in words is "twenty-three billion, four hundred thirty-one million, three hundred twenty-four thousand, four hundred twenty-one".