21234230023 has 2 divisors, whose sum is σ = 21234230024. Its totient is φ = 21234230022.

The previous prime is 21234229963. The next prime is 21234230057. The reversal of 21234230023 is 32003243212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21234230023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21234229976 and 21234230003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21234230623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617115011 + 10617115012.

It is an arithmetic number, because the mean of its divisors is an integer number (10617115012).

Almost surely, 2^21234230023 is an apocalyptic number.

21234230023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234230023 is an equidigital number, since it uses as much as digits as its factorization.

21234230023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21234230023 its reverse (32003243212), we get a palindrome (53237473235).

The spelling of 21234230023 in words is "twenty-one billion, two hundred thirty-four million, two hundred thirty thousand, twenty-three".