21442244303 has 2 divisors, whose sum is σ = 21442244304. Its totient is φ = 21442244302.

The previous prime is 21442244273. The next prime is 21442244323. The reversal of 21442244303 is 30344224412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21442244303 - 2²⁸ = 21173808847 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21442244323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721122151 + 10721122152.

It is an arithmetic number, because the mean of its divisors is an integer number (10721122152).

Almost surely, 2^21442244303 is an apocalyptic number.

21442244303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442244303 is an equidigital number, since it uses as much as digits as its factorization.

21442244303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21442244303 its reverse (30344224412), we get a palindrome (51786468715).

The spelling of 21442244303 in words is "twenty-one billion, four hundred forty-two million, two hundred forty-four thousand, three hundred three".