21442553033135 has 16 divisors (see below), whose sum is σ = 28459305317856. Its totient is φ = 15406541221248.

The previous prime is 21442553033113. The next prime is 21442553033141. The reversal of 21442553033135 is 53133035524412.

It is a cyclic number.

It is not a de Polignac number, because 21442553033135 - 2²² = 21442548838831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21442553033092 and 21442553033101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4457908829 + ... + 4457913638.

It is an arithmetic number, because the mean of its divisors is an integer number (1778706582366).

Almost surely, 2^{21442553033135} is an apocalyptic number.

21442553033135 is a deficient number, since it is larger than the sum of its proper divisors (7016752284721).

21442553033135 is a wasteful number, since it uses less digits than its factorization.

21442553033135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8915822522.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 21442553033135 its reverse (53133035524412), we get a palindrome (74575588557547).

The spelling of 21442553033135 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty-three million, thirty-three thousand, one hundred thirty-five".