23234123821 has 2 divisors, whose sum is σ = 23234123822. Its totient is φ = 23234123820.

The previous prime is 23234123797. The next prime is 23234123863. The reversal of 23234123821 is 12832143232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19530062500 + 3704061321 = 139750^2 + 60861^2 .

It is a cyclic number.

It is not a de Polignac number, because 23234123821 - 2¹⁹ = 23233599533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23234123881) 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, 11617061910 + 11617061911.

It is an arithmetic number, because the mean of its divisors is an integer number (11617061911).

Almost surely, 2^23234123821 is an apocalyptic number.

It is an amenable number.

23234123821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23234123821 is an equidigital number, since it uses as much as digits as its factorization.

23234123821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The spelling of 23234123821 in words is "twenty-three billion, two hundred thirty-four million, one hundred twenty-three thousand, eight hundred twenty-one".