21654327003241 has 3 divisors (see below), whose sum is σ = 21654331656663. Its totient is φ = 21654322349820.

The previous prime is 21654327003227. The next prime is 21654327003289. The reversal of 21654327003241 is 14230072345612.

The square root of 21654327003241 is 4653421.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 7146912503641 + 14507414499600 = 2673371^2 + 3808860^2 .

It is not a de Polignac number, because 21654327003241 - 2²¹ = 21654324906089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21654327003194 and 21654327003203.

It is not an unprimeable number, because it can be changed into a prime (21654327003041) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2326711 + ... + 6980131.

It is an arithmetic number, because the mean of its divisors is an integer number (7218110552221).

Almost surely, 2^{21654327003241} is an apocalyptic number.

21654327003241 is the 4653421-st square number.

21654327003241 is the 2326711-st centered octagonal number.

It is an amenable number.

21654327003241 is a deficient number, since it is larger than the sum of its proper divisors (4653422).

21654327003241 is an frugal number, since it uses more digits than its factorization.

21654327003241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9306842 (or 4653421 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

Adding to 21654327003241 its reverse (14230072345612), we get a palindrome (35884399348853).

The spelling of 21654327003241 in words is "twenty-one trillion, six hundred fifty-four billion, three hundred twenty-seven million, three thousand, two hundred forty-one".