21324653210550 has 48 divisors (see below), whose sum is σ = 54591112230912. Its totient is φ = 5503136311200.

The previous prime is 21324653210501. The next prime is 21324653210569. The reversal of 21324653210550 is 5501235642312.

It is a junction number, because it is equal to n+sod(n) for n = 21324653210499 and 21324653210508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2292968814 + ... + 2292978113.

It is an arithmetic number, because the mean of its divisors is an integer number (1137314838144).

Almost surely, 2^{21324653210550} is an apocalyptic number.

21324653210550 is an abundant number, since it is smaller than the sum of its proper divisors (33266459020362).

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

21324653210550 is a wasteful number, since it uses less digits than its factorization.

21324653210550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585946973 (or 4585946968 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 21324653210550 its reverse (5501235642312), we get a palindrome (26825888852862).

The spelling of 21324653210550 in words is "twenty-one trillion, three hundred twenty-four billion, six hundred fifty-three million, two hundred ten thousand, five hundred fifty".