21302441055 has 72 divisors (see below), whose sum is σ = 43178413824. Its totient is φ = 9687081600.

The previous prime is 21302441029. The next prime is 21302441059. The reversal of 21302441055 is 55014420312.

21302441055 is a `hidden beast` number, since 213 + 0 + 2 + 441 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 21302441055 - 2⁸ = 21302440799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302441059) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 395865 + ... + 446445.

It is an arithmetic number, because the mean of its divisors is an integer number (599700192).

Almost surely, 2^21302441055 is an apocalyptic number.

21302441055 is an abundant number, since it is smaller than the sum of its proper divisors (21875972769).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302441055 is a wasteful number, since it uses less digits than its factorization.

21302441055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50797 (or 50787 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21302441055 its reverse (55014420312), we get a palindrome (76316861367).

The spelling of 21302441055 in words is "twenty-one billion, three hundred two million, four hundred forty-one thousand, fifty-five".