21450205233441 has 40 divisors (see below), whose sum is σ = 33956310465000. Its totient is φ = 13470271799040.

The previous prime is 21450205233397. The next prime is 21450205233493. The reversal of 21450205233441 is 14433250205412.

It is a happy number.

21450205233441 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 0 + 205 + 2 + 3 + 3 + 441 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4364217643041 + 17085987590400 = 2089071^2 + 4133520^2 .

It is not a de Polignac number, because 21450205233441 - 2¹⁸ = 21450204971297 is a prime.

It is a super-2 number, since 2×21450205233441² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21450205233396 and 21450205233405.

It is not an unprimeable number, because it can be changed into a prime (21450205234441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 111265066 + ... + 111457683.

It is an arithmetic number, because the mean of its divisors is an integer number (848907761625).

Almost surely, 2^{21450205233441} is an apocalyptic number.

It is an amenable number.

21450205233441 is a deficient number, since it is larger than the sum of its proper divisors (12506105231559).

21450205233441 is a wasteful number, since it uses less digits than its factorization.

21450205233441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222722831 (or 222722822 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 21450205233441 its reverse (14433250205412), we get a palindrome (35883455438853).

The spelling of 21450205233441 in words is "twenty-one trillion, four hundred fifty billion, two hundred five million, two hundred thirty-three thousand, four hundred forty-one".