21442550320550 has 12 divisors (see below), whose sum is σ = 39883143596316. Its totient is φ = 8577020128200.

The previous prime is 21442550320453. The next prime is 21442550320559. The reversal of 21442550320550 is 5502305524412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442550320559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214425503156 + ... + 214425503255.

It is an arithmetic number, because the mean of its divisors is an integer number (3323595299693).

Almost surely, 2^{21442550320550} is an apocalyptic number.

21442550320550 is a deficient number, since it is larger than the sum of its proper divisors (18440593275766).

21442550320550 is a wasteful number, since it uses less digits than its factorization.

21442550320550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428851006423 (or 428851006418 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

Adding to 21442550320550 its reverse (5502305524412), we get a palindrome (26944855844962).

The spelling of 21442550320550 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty million, three hundred twenty thousand, five hundred fifty".