21442055363 has 2 divisors, whose sum is σ = 21442055364. Its totient is φ = 21442055362.

The previous prime is 21442055317. The next prime is 21442055377. The reversal of 21442055363 is 36355024412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21442055363 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21442055263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721027681 + 10721027682.

It is an arithmetic number, because the mean of its divisors is an integer number (10721027682).

Almost surely, 2^21442055363 is an apocalyptic number.

21442055363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442055363 is an equidigital number, since it uses as much as digits as its factorization.

21442055363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21442055363 its reverse (36355024412), we get a palindrome (57797079775).

The spelling of 21442055363 in words is "twenty-one billion, four hundred forty-two million, fifty-five thousand, three hundred sixty-three".