21442535627 has 2 divisors, whose sum is σ = 21442535628. Its totient is φ = 21442535626.

The previous prime is 21442535599. The next prime is 21442535629. The reversal of 21442535627 is 72653524412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21442535627 - 2⁶ = 21442535563 is a prime.

Together with 21442535629, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21442535629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721267813 + 10721267814.

It is an arithmetic number, because the mean of its divisors is an integer number (10721267814).

Almost surely, 2^21442535627 is an apocalyptic number.

21442535627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442535627 is an equidigital number, since it uses as much as digits as its factorization.

21442535627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 41.

It can be divided in two parts, 214425 and 35627, that added together give a palindrome (250052).

The spelling of 21442535627 in words is "twenty-one billion, four hundred forty-two million, five hundred thirty-five thousand, six hundred twenty-seven".