21300355055 has 16 divisors (see below), whose sum is σ = 29924403264. Its totient is φ = 14249713920.

The previous prime is 21300355051. The next prime is 21300355081. The reversal of 21300355055 is 55055300312.

It is not a de Polignac number, because 21300355055 - 2² = 21300355051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300355051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7420292 + ... + 7423161.

It is an arithmetic number, because the mean of its divisors is an integer number (1870275204).

Almost surely, 2^21300355055 is an apocalyptic number.

21300355055 is a deficient number, since it is larger than the sum of its proper divisors (8624048209).

21300355055 is a wasteful number, since it uses less digits than its factorization.

21300355055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14843506.

The product of its (nonzero) digits is 11250, while the sum is 29.

Adding to 21300355055 its reverse (55055300312), we get a palindrome (76355655367).

The spelling of 21300355055 in words is "twenty-one billion, three hundred million, three hundred fifty-five thousand, fifty-five".