21442286741 has 2 divisors, whose sum is σ = 21442286742. Its totient is φ = 21442286740.

The previous prime is 21442286737. The next prime is 21442286753. The reversal of 21442286741 is 14768224412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21062426641 + 379860100 = 145129^2 + 19490^2 .

It is a cyclic number.

It is not a de Polignac number, because 21442286741 - 2² = 21442286737 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21442286441) 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, 10721143370 + 10721143371.

It is an arithmetic number, because the mean of its divisors is an integer number (10721143371).

Almost surely, 2^21442286741 is an apocalyptic number.

It is an amenable number.

21442286741 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442286741 is an equidigital number, since it uses as much as digits as its factorization.

21442286741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 41.

The spelling of 21442286741 in words is "twenty-one billion, four hundred forty-two million, two hundred eighty-six thousand, seven hundred forty-one".