21442583273 has 2 divisors, whose sum is σ = 21442583274. Its totient is φ = 21442583272.

The previous prime is 21442583257. The next prime is 21442583287. The reversal of 21442583273 is 37238524412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20759910889 + 682672384 = 144083^2 + 26128^2 .

It is a cyclic number.

It is not a de Polignac number, because 21442583273 - 2⁴ = 21442583257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21442583273.

It is not a weakly prime, because it can be changed into another prime (21442583873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721291636 + 10721291637.

It is an arithmetic number, because the mean of its divisors is an integer number (10721291637).

Almost surely, 2^21442583273 is an apocalyptic number.

It is an amenable number.

21442583273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442583273 is an equidigital number, since it uses as much as digits as its factorization.

21442583273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 41.

The spelling of 21442583273 in words is "twenty-one billion, four hundred forty-two million, five hundred eighty-three thousand, two hundred seventy-three".