21230006923273 has 2 divisors, whose sum is σ = 21230006923274. Its totient is φ = 21230006923272.

The previous prime is 21230006923267. The next prime is 21230006923289. The reversal of 21230006923273 is 37232960003212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21191319180409 + 38687742864 = 4603403^2 + 196692^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230006923273 - 2²⁹ = 21229470052361 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230006923243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615003461636 + 10615003461637.

It is an arithmetic number, because the mean of its divisors is an integer number (10615003461637).

Almost surely, 2^{21230006923273} is an apocalyptic number.

It is an amenable number.

21230006923273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230006923273 is an equidigital number, since it uses as much as digits as its factorization.

21230006923273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 40.

Adding to 21230006923273 its reverse (37232960003212), we get a palindrome (58462966926485).

The spelling of 21230006923273 in words is "twenty-one trillion, two hundred thirty billion, six million, nine hundred twenty-three thousand, two hundred seventy-three".