21602433224065 has 8 divisors (see below), whose sum is σ = 26816813657640. Its totient is φ = 16686017386752.

The previous prime is 21602433224051. The next prime is 21602433224069. The reversal of 21602433224065 is 56042233420612.

It can be written as a sum of positive squares in 4 ways, for example, as 1466660209 + 21600966563856 = 38297^2 + 4647684^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21602433224065 - 2⁷ = 21602433223937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21602433224069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74491148904 + ... + 74491149193.

It is an arithmetic number, because the mean of its divisors is an integer number (3352101707205).

Almost surely, 2^{21602433224065} is an apocalyptic number.

It is an amenable number.

21602433224065 is a deficient number, since it is larger than the sum of its proper divisors (5214380433575).

21602433224065 is a wasteful number, since it uses less digits than its factorization.

21602433224065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148982298131.

The product of its (nonzero) digits is 414720, while the sum is 40.

Adding to 21602433224065 its reverse (56042233420612), we get a palindrome (77644666644677).

The spelling of 21602433224065 in words is "twenty-one trillion, six hundred two billion, four hundred thirty-three million, two hundred twenty-four thousand, sixty-five".