23043434320421 has 2 divisors, whose sum is σ = 23043434320422. Its totient is φ = 23043434320420.

The previous prime is 23043434320409. The next prime is 23043434320433. The reversal of 23043434320421 is 12402343434032.

It is a balanced prime because it is at equal distance from previous prime (23043434320409) and next prime (23043434320433).

It can be written as a sum of positive squares in only one way, i.e., 19139846257921 + 3903588062500 = 4374911^2 + 1975750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23043434320421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23043434320441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11521717160210 + 11521717160211.

It is an arithmetic number, because the mean of its divisors is an integer number (11521717160211).

Almost surely, 2^{23043434320421} is an apocalyptic number.

It is an amenable number.

23043434320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23043434320421 is an equidigital number, since it uses as much as digits as its factorization.

23043434320421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 23043434320421 its reverse (12402343434032), we get a palindrome (35445777754453).

The spelling of 23043434320421 in words is "twenty-three trillion, forty-three billion, four hundred thirty-four million, three hundred twenty thousand, four hundred twenty-one".