21442023402055 has 32 divisors (see below), whose sum is σ = 25845240888000. Its totient is φ = 17077272576000.

The previous prime is 21442023402047. The next prime is 21442023402227. The reversal of 21442023402055 is 55020432024412.

It is not a de Polignac number, because 21442023402055 - 2³ = 21442023402047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21442023402055.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 4612177371 + ... + 4612182019.

It is an arithmetic number, because the mean of its divisors is an integer number (807663777750).

Almost surely, 2^{21442023402055} is an apocalyptic number.

21442023402055 is a deficient number, since it is larger than the sum of its proper divisors (4403217485945).

21442023402055 is a wasteful number, since it uses less digits than its factorization.

21442023402055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9075.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 21442023402055 its reverse (55020432024412), we get a palindrome (76462455426467).

The spelling of 21442023402055 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, fifty-five".